Advertisements
Advertisements
प्रश्न
Choose the correct alternative answer for the following question.
The curved surface area of a cylinder is 440 cm 2 and its radius is 5 cm. Find its height.
पर्याय
`44/pi` cm
22 \[\pi\] CM
44 \[\pi\] CM
\[\frac{22}{\pi}\] cm
उत्तर
`44/pi` cm
Explanation:
The radius of the cylinder, r = 5 cm
Let the height of the cylinder be h cm.
Curved surface area of the cylinder = 440 cm2
`therefore 2pi"h" = 440`
`=> "h" = 440/(2pi"r")`
`=> "h" = 440/(2pi xx 5) = 44/pi` cm
Thus, the height of the cylinder is `44/Pi` cm.
संबंधित प्रश्न
In Fig. 4, ABCD is a square of side 14 cm. Semi-circles are drawn with each side of square as diameter. Find the area of the shaded region.
(use `pi=22/7`)
In Fig. 7, are shown two arcs PAQ and PBQ. Arc PAQ is a part of circle with centre O and radius OP while arc PBQ is a semi-circle drawn on PQ ad diameter with centre M. If OP = PQ = 10 cm show that area of shaded region is `25(sqrt3-pi/6)cm^2`.
A bicycle whell makes 5000 revolutions in moving 11 km. Find the diameter of the wheel
A sector is cut from a circle of radius 21 cm. The angle of the sector is 150º. Find the length of its arc and area.
Find the circumference of the circle with the following radius: (Take `bb(pi = 22/7`)
14 cm
Find the angle subtended at the centre of circle of radius 5cm by an arc of length `((5pi)/3)` cm
In the given figure, if A(P-ABC) = 154 cm2 radius of the circle is 14 cm, find
(1) `∠APC`
(2) l ( arc ABC) .
Choose the correct alternative answer for the following question.
The radii of two circles are 19 cm and 9 cm, Find the radius of the circle which has circumference equal to the sum of the circumferences of the two circles.
The circumferences of two circles are in the ratio 2: 3. What is the ratio between their areas?
A horse is tied with a 21 m laig rope to the corner of a field which is in the shape of an equilateral triangle. Find the area of the field over which it can graze.
The diameter of a wheel is 1.4m. How many revolutions does it make in moving a distance of 2.2 kms?
The diameter of a circular field is 56 m. Find its circumference and cost of fencing it at the rate of ₹80 per m. (Take π =`22/7`)
A bucket is raised from a well by means of a rope wound round a wheel of diameter 35 cm. If the bucket ascends in 2 minutes with a uniform speed of 1.1 m per sec, calculate the number of complete revolutions the wheel makes in raising the bucket.
Find the perimeter of the given shape (Take π = `22/7`).
Diameters of different circles are given below. Find their circumference (Take π = `22/7`)
d = 70 cm
A wheel of a car covers a distance of 3520 cm in 20 rotations. Find the radius of the wheel?
Ratio of the circumference of a circle to its diameter is denoted by symbol ______.
Circumference ‘C’ of a circle is equal to 2π × ______.
