Question

find the volume of the largest cylinder formed when a rectangular plane of paper 22 cm by 15 cm is rolled along its longer side.

Answer 1

According to question paper rolled along long side. Therefore height of the cylinder 'h' is 15cm and face side circle have perimeter is 22cm.
We know that, circle perimeter is 2*Π*r where 'r' radius of circle.
therefore,
2*Π*r =22
2*22/7*r = 22
r = 7/2 cm.
Volume of cylinder is Π*r2h.
=22/7 * (7/2)2 * 15
=(22 * 49 * 15)/28
=577.5(approximately)

Answer 2

This is ur answer hope it will help u