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Mathematics Basic Official 2023-2024 English Medium Class 10 Question Paper Solution

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Mathematics [Basic Official]
Marks: 80 CBSE
English Medium

Academic Year: 2023-2024
Date & Time: 11th March 2024, 10:30 am
Duration: 3h
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General Instructions:

  1. This question paper has 5 Sections A, B, C, D and E.
  2. Section A has 20 Multiple Choice Questions (MCQs) carrying 1 mark each.
  3. Section B has 5 Short Answer-I (SA-I) type questions carrying 2 marks each.
  4. Section C has 6 Short Answer-II (SA-Il) type questions carrying 3 marks each.
  5. Section D has 4 Long Answer (LA) type questions carrying 5 marks each.
  6. Section E has 3 Case Based integrated units of assessment (4 marks each) with sub-parts of the values of 1, 1 and 2 marks each respectively.
  7. All questions are compulsory. However, an internal choice in 2 Qs of 2 marks, 2 Qs of 3 marks and 2 Qs of 5 marks has been provided. An internal choice has been provided in the 2 marks question of Section E.
  8. Draw neat figures wherever required. Take `pi = 22/7` wherever required if not stated.

Section A
[1]1 | Q. No. 1 to 20 are multiple choice questions of 1 mark each.

From an external point P, a tangent PA is drawn to circle. The number of tangents through P parallel to PA is ______.

2

more than 2

1

0

Concept: undefined - undefined
Chapter:
[1]2

If the volume of a sphere is `11/21  "cm"^3`, then the radius of the sphere is ______.

2 cm

4 cm

`1/2` cm

`1/4` cm

Concept: undefined - undefined
Chapter:
[1]3

In the given figure, graph of a polynomial f(x) is shown. The number of zeroes of polynomial f(x) is ______.

3

1

0

2

Concept: undefined - undefined
Chapter:
[1]4

lf for a distribution `sum_1^n f_i  x_i = 132 + 5p, sum_1^n f_i = 20` and mean of the distribution is 8.1, then the value of p is ______.

3

6

4

5

Concept: undefined - undefined
Chapter:
[1]5

If in an AP, a = 2 and S10 = 335, then its 10th term is ______.

55

65

68

58

Concept: undefined - undefined
Chapter:
[1]6

From a solid cube of side 14 cm, a sphere of maximum diameter is carved out. The radius of sphere is ______.

7 cm

14 cm

`7/2` cm

`sqrt(14)` cm

Concept: undefined - undefined
Chapter:
[1]7

If the two zeroes of a quadratic polynomial are `±  sqrt5` then the quadratic polynomial is ______.

x2 + 5

`(x + sqrt5)^2`

4(x2 - 5)

`x^2 - sqrt5`

Concept: undefined - undefined
Chapter:
[1]8

In the given figure, tangents PA and PB drawn from P to circle are inclined to each other at an angle of 80°. The measure of ∠PAB is ______.

80°

60°

50°

40°

Concept: undefined - undefined
Chapter:
[1]9

If in the given figure, DE || BC.

If AD = 2.8 cm, DB = 21 cm and EC = 4.8 cm, then the value of x is ______.

3.6 cm

2.4 cm

6.4 cm

4.8 cm

Concept: undefined - undefined
Chapter:
[1]10

In a right angled ΔABC, ∠A = 90° and AB = AC. The value of sin C is ______.

0

`sqrt3/2`

`1/2`

`1/sqrt2`

Concept: undefined - undefined
Chapter:
[1]11

Two fair coins are tossed together. The probability of getting 2 heads is ______.

`1/2`

`3/4`

`1/4`

`3/8`

Concept: undefined - undefined
Chapter:
[1]12

If the mean and median of a data are 10 and 11 respectively, then mode of the data is ______.

12

8

20

13

Concept: undefined - undefined
Chapter:
[1]13

If the distances of the points P(x , y) from (1, 0) and (0, 1) are equal, then which of the following is ______.

x + y = 0

x = y + 1

y = x + 1

x = y

Concept: undefined - undefined
Chapter:
[1]14

The value(s) of k for which the quadratic equation 5x2 − 9kx + 5 = 0 has real and equal roots is/are ______.

`-10/9`

`±9/10`

`10/9`

`±10/9`

Concept: undefined - undefined
Chapter:
[1]15

The lines represented by linear equations x = a and y = b (a ≠ b) are ______.

Intersecting at (a, b)

Intersecting at (b, a)

Parallel

Coincident

Concept: undefined - undefined
Chapter:
[1]16

If cos θ = `1/sqrt2`, then tan θ is equal to ______.

`1/sqrt2`

0

1

`sqrt2 + 1`

Concept: undefined - undefined
Chapter:
[1]17

A die is thrown once. The probability of getting a number less than 6 is ______.

0

`5/6`

`1/6`

1

Concept: undefined - undefined
Chapter:
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[1]18

In the given figure, two concentric circles of radii 5 cm and 3 cm have their centre O. OAB is a sector of outer circle making an angle of 60° at the centre, while OCD is the sector of smaller circle. The area of the shaded region is ______.

`(7pi)/2  cm^2`

`(8pi)/3  cm^2`

`(25pi)/6  cm^2`

`(3pi)/2  cm^2`

Concept: undefined - undefined
Chapter:
[1]19 | In question number 19 and 20, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option from the following.

Assertion (A): The distance of P (a, b) from origin is a2 + b2.

Reason (R): The distance between two points `A(x_1, y_1) and B(x_2, y_2)` is `sqrt((x_2 - x_1)^2 + (y_2 - y_1)^2)`.

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).

Assertion (A) is true but Reason (R) is false.

Assertion (A) is false but Reason (R) is true.

Concept: undefined - undefined
Chapter:
[1]20

Assertion (A): `sqrt2(5 - sqrt2)` is an irrational number.

Reason (R): Product of two irrational number is always irrational.

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).

Assertion (A) is true but Reason (R) is false.

Assertion (A) is false but Reason (R) is true.

Concept: undefined - undefined
Chapter:
Section B
[2]21 | Q. No. 21 to 25 are very short answer type questions of 2 marks each.

Evaluate:

5sin2 45° − sec 60° cot2 30°.

Concept: undefined - undefined
Chapter:
[2]22

The point P(x, y) divides the line segment joining the points A(−1, 3) and B(9, 8) such that AP : PB = k : 1. If the coordinates of P are such that x = y, then find the value of k.

Concept: undefined - undefined
Chapter:
[2]23
[2]23.a

If Q(0, 2) is equidistant from P(5, −3) and R(x, 7), then find the value(s) of x.

Concept: undefined - undefined
Chapter:
OR
[2]23.b

If A(1, 1) and B(7, 9) are the end points of a diameter of a circle, then find the coordinates of the centre of the circle.

Concept: undefined - undefined
Chapter:
[2]24

There are 80 cards numbered from 1 to 80. One card is drawn at random from them. Find the probability that the number on the selected card is not divisible by 8.

Concept: undefined - undefined
Chapter:
[2]25
[2]25.a

Prove that `-7 - 2sqrt3` is an irrational number, given that `sqrt3` is an irrational number.

Concept: undefined - undefined
Chapter:
OR
[2]25.b

Explain why (7 × 11 × 13 + 2 × 11) is not a prime number.

Concept: undefined - undefined
Chapter:
SECTION C
[3]26 | Q. No. 26 to 31 are short answer type questions of 3 marks each.

In the given figure, `angle`ABC = `angle`ACB and `(BC)/(BE) = (BD)/(AC)`.

Show that `triangle`ABE ∼ `triangle`DBC and AE || DC.

Concept: undefined - undefined
Chapter:
[3]27
[3]27.a

A vessel is in the form of a hollow hemisphere surmounted by a hollow cylinder. The diameter of the hemisphere is 14 cm and the total height of the vessel is 13 cm. Find the inner surface area of the vessel.

Concept: undefined - undefined
Chapter:
OR
[3]27.b

A solid toy is in the form of a hemisphere surmounted by a right circular cone. The height of the cone is 2 cm and the diameter of the base is 4 cm. Determine the volume of the toy.

Concept: undefined - undefined
Chapter:
[3]28
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[3]28.a

Prove that (sinθ + cosecθ)2 + (cosθ + secθ)= 7 + tan2θ + cot2θ.

Concept: undefined - undefined
Chapter:
OR
[3]28.b

If cos A = `5/13`, then verify that `cosA/(1 - tanA) + sinA/(1 - cotA) = cosA + sinA`

Concept: undefined - undefined
Chapter:
[3]29
[3]29.a

The altitude of a right angled triangle is 7 cm less than its base. If its hypotenuse is 17 cm long, then represent the above information in the form of a quadratic equation.

Concept: undefined - undefined
Chapter:
OR
[3]29.b

The altitude of a right angled triangle is 7 cm less than its base. If its hypotenuse is 17 cm long, then find the length of the sides of the triangle.

Concept: undefined - undefined
Chapter:
[3]30

Find the HCF and LCM of 260 and 910 by prime factorisation method.

Concept: undefined - undefined
Chapter:
[3]31

If one zero of the polynomial x2 − 8x + k exceeds the other by 2, then find the zeroes and value of k.

Concept: undefined - undefined
Chapter:
SECTION D
[5]32 | Q. No. 32 to 35 are long answer type question of 5 marks each.
[5]32.a

Using graphical method, solve the following pair of equations.

x + 2y = 8 and 3x − 2y = 12

Concept: undefined - undefined
Chapter:
OR
[5]32.b

The sum of the digits of a 2-digit number is 9. Also, nine times this number is twice the number obtained by reversing the order of the digits. Find the number.

Concept: undefined - undefined
Chapter:
[5]33

The marks obtained by 45 students of a class in a test are given below:

Marks 40-45 45-50 50-55 55-60 60-65 65-70
Number of students 8 9 10 9 5 4

Find the mean and median marks.

Concept: undefined - undefined
Chapter:
[5]34

The angle of elevation of a helicopter in air from a point A an the ground is 45°. After a flight of 25 sec, the angle of elevation changes to 30 °. If the helicopter is flying at a constant height of 2500 m, then find the speed of the helicopter. (Use `sqrt3` = 1.73)

Concept: undefined - undefined
Chapter:
[5]35
[5]35.a

In the given figure, AB is chord of length 6 cm of a circle of radius 5 cm. The tangents at A and B intersect at point P. Find the length of PB.

Concept: undefined - undefined
Chapter:
OR
[5]35.b

Prove that the parallelogram circumscribing a circle is a rhombus. Also, find the area of the rhombus, if radius of circle is 3 cm and length of one side of the rhombus is 10 cm. 

Concept: undefined - undefined
Chapter:
SECTION E
[4]36 | Q. No. 36 to 38 are case study based questions of 4 marks each.

NSS (National Service Scheme) aims to connect the students to the community and to involve them in problem solving process.

NSS symbol is based on the 'Rath' wheel of the Konark Sun Temple situated in Odisha. The wheel signifies the progress cycle of life. The diagrammatic representation of the symbol is given below

Observe the figure given above. The diameters of inner circle are equally placed. Given that OP = 21 cm and OS = 10 cm:

Based on the above information, answer the following questions:.

  1. Find m ∠ROS.     [1]
  2. Find the perimeter of sector OPQ.     [1]
    1. Find the area of shaded region PQRS.     [2]
      OR
    2. Find the area of shaded region ACB, i.e., the segment ACB.     [2]
Concept: undefined - undefined
Chapter:
[4]37

In the figure given below, a folding table is shown.

The legs of the table are represented by line segments AB and CD intersecting at O. Join AC and BD. Considering table top is a parallel to the ground and OB = x, OD = x + 3, OC = 3x + 19 and OA = 3x + 4, answer the following questions.

  1. Prove that ΔOAC is similar to ΔOBD.    [1]
  2. Prove that `(OA)/(AC) = (OB)/(BD)`.    [1]
    1. Observe the figure and find the value of x. Hence, find the length of OC.    [2]
      OR
    2. Observe the figure and find `(BD)/(AC)`.    [2]
Concept: undefined - undefined
Chapter:
[4]38

While preparing for a competitive examination, Akbar came across a match-stick pattern based question. The pattern is given below:

Based on the above information, answer the following questions:

  1. Write first term and common difference of the AP formed by number of squares in each figure.     [1]
  2. Write first term and common difference of the AP formed by number of sticks used in each figure.      [1]
    1. How many squares are there in Fig (10)? Also, write the number of sticks used in figure. (10).     [2]
      OR
    2. If 88 sticks are used to make mth (fig (m)), then find the value of m. How many squares are formed in this figure?     [2]
Concept: undefined - undefined
Chapter:

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