Question

A rectangular piece of paper of dimensions 88 x 20 cm is folded without overlapping to make a cylinder of height 28 cm. The volume of the cylinder is: 1. 1456π cm3 2.4277π cm3 3. 1746π cm3 4. 5488π cm3 Also please explain your answer Thanks.. ☺☺

Answer 1

there is a mistake in the 1st line of question.  The dimension of the paper are 88 cm * 28 cm.

Since the height of cylinder is 28 cm.  The side of 88 cm is folded to become the circumference of the flat face of cylinder. 

Radius of cylinder  =  R   =>   2 π R = 88 cm  =>  R = 14 cm

Volume = π R² h = π * 14² * 28 cm³ = 5488 cm³