The height of a cylinder is 21cm and its curved surface area is 924cm'. Find the radius of cylinder.
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Answer:
CSA of a cylinder = 2 * 22/7 * r * h
Thus,
2 * 22/7 * r * 21 = 924
2 * 22 * 3 * r = 924
r = 924/ 2 * 22 * 3
r = 462/ 22 * 3
r = 7 cm
Hope it helps.
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