Question

a rectangular piece with 30 cm breadth and 70 cm length is rolled along with its breadth find the volume of cylinder ​

Answer 1

Given,

Breadth=30 cm

Length=70 cm

According to the question length becomes the circumference and breadth becomes the height.

Now we have

Height=30 cm

Circumference=70 cm

2πr=70 cm

πr=35 cm

r=(35×7)/22=11.13

Volume of the cylinder=πr^2h

=22/7×(11.13)^2×30

=3.14×123.87×30

=388.95×30

=11668.5 cm^3