Question

if base radius and height of a cylinder are increased by 100% then its volume increased by

Answer 1

let radii be x. { here my # represents pi}
and volume be y
volume = #x^2y. eq 1

if both radii and height increased 100% than
new radii = 2x
new height = 2y
new volume = #4x^ * 2y
=#8x^2y. eq 2

comparing 1 and 2
we observe that volume has been by 8 times

volume increased %. =#8x^2y/#x^2y * 100
=800 %

hence volume increased by 800%