Question

If the radius of a cylinder is double and height is halvsd then find the volume of cylinder

Answer 1

we know that volume of cylinder =

pie r square h

so, r= 2×r =2r (radius)

and h =1/2h (height)

according to the formula

pir r square h

=22/7×2r×2r×1/2

=6.28 cm^3

Answer 2

let radius of cylinder=r

let height=h

volume of cylinder=πr∆2h

=π(2r∆2)1/2h

ratio=πr∆2h/π4r∆2×1/2×h.

=1/2

hence volume will increase 2 times