Question

A rectangular piece of iron sheet is 44 m long and 20 m broad. It is rolled along its length to form a cylinder. Find the volume of the cylinder so formed.

Answer 1

Length of the paper = 44 m
breadth  = 20m

now it is rolled along its length

so the circumference = 44m
and height of the cylinder will be 20 m

we have to find r 
2πr = 44
r = 44/2 × 7/22
r = 7 m

volume of cylinder = πr²h
                                = 22/7 × 7 × 7 × 20
                               = 3080 m³

Answer 2

Length = 44m
Breadth = 20m
 Circumference = 44m
2*22/7*r = 44
44/7 *r = 44
44r = 7*44
r = 7*44/44
r = 7
22/7*7*7*20 = 3080