Question

35. If the radius of a cylinder if doubled, then how many times the volume will
increase ?
(a) 0
(b)2
(c)3
(d) None of these​

Answer 1

Answer:

let the new radius be 2r.

Formula of volume of cylinder= πr^2(h)

so, if radius is doubled,

new volume-

π(2r)^2(h)

=π4r^2(h)

so, it becomes 4πr^2(h)

thus, as the volume increases 4 times, answer is none of these.

Hope it helps...

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