Question

If the radius of a right circular cylinder is doubled and
height becomes of the original height, then find the
ratio of the curved surface areas of the new cylinder to
that of the original cylinder.​

Answer 1

Answer:

1:6

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Answer 2

Answer:

csa of old cylinder = 2πrh

CSA of new cylinder = 2 π(2r)h

ratio of csa/CSA = 1/2

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