Advertisements
Advertisements
Question
Solution
Radius of the circle, r = 7 cm
m(arc MBN) = ∠MON = θ = 60º
A(O-MCN) = Area of the sector OMCN
= Area of the circle − Area of the sector OMBN
= 154 − 25.7
= 128.3 cm2
Taking Question image data : m(arcMBN) = 68°
A(O - MBN) = `(68/360) ` × area of circle
= 29.09 cm²
A(O - MCN) = area of circle - A(O - MBN)
=> A(O - MCN) = 154- 29.09 = 124.91 cm²
APPEARS IN
RELATED QUESTIONS
In Fig. 4, O is the centre of a circle such that diameter AB = 13 cm and AC = 12 cm. BC is joined. Find the area of the shaded region. (Take π = 3.14)
A pendulum swings through an angle of 30º and describes an arc 8.8 cm in length. Find the length of the pendulum.
The radii of two circles are 8 cm and 6 cm respectively. Find the radius of the circle having area equal to the sum of the areas of the two circles.
In the given figure, O is the centre of the circle with AC = 24 cm, AB = 7 cm and ∠BOD = 90°. Find the area of the shaded region.
If the circumference of a circular sheet is 154 m, find its radius. Also find the area of
the sheet. (Take `pi = 22/7`)
The circumference of a circle exceeds diameter by 16.8 cm. Find the circumference of
circle.
Four cows are tethered at four corners of a square plot of side 50m, so that’ they just cant reach one another. What area will be left ungrazed.
The circumference of a circle exceeds its diameter by 45 cm. Find the circumference of the circle.
The area of an equilateral triangle is `49sqrt(3)` cm2 . Taking each angular point as centre, circles are drawn with radius equal to half the length of the side of the triangle. Find the area of the triangle not included in the circles. [Take π = 1.73]
Diameter of the circular garden is 42 m. There is a 3.5 m wide road around the garden. Find the area of the road.
A conical tent with a capacity of 600 m3 stands on a circular base of area 160 m2 Find in m2 the area of the canvas.
A lawn is in the shape of a semi-circle of diameter 42 m. The lawn is surrounded by a flower bed of width 7 m all around. Find the area of the flower bed in m2 .
Find the area of a circle whose circumference is 22 cm.
The diameter of a circle is 5.6 cm. Find its circumference.
Find the area and perimeter of the circles with following: Diameter = 35cm
Find the radius and area of the circle which has circumference equal to the sum of circumferences of the two circles of radii 3 cm and 4 cm respectively.
The circumference of a circle is equal to the perimeter of a square. The area of the square is 484 sq.m. Find the area of the circle.
Find the perimeter of the given shape (Take π = `22/7`).
The cost of fencing a circular race course at the rate of ₹ 8 per metre is ₹ 2112. Find the diameter of the race course
Areas of two circles are equal. Is it necessary that their circumferences are equal? Why?
