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The C.S.A. of a right circular cylinder whose r = 21 cm and h = 7 cm

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The C.S.A. of a right circular cylinder whose r = 21 cm and h = 7 cm

A) 924 cm2 

B) 6468 cm2 

C) 9702 cm2 

D) 67914 cm2

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2 Answers

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Correct option is (A) 924 cm2

Curved surface area of cylinder \(=2\pi rh\)

\(=2\times\frac{22}7\times21\times7=44\times21\)

= \(924\,cm^2\)

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Correct option is  A) 924 cm2 

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