Question

Find the volum of the cylinder with circumference 12cm and height 40cm

Answer 1

Given-circumference = 12cm
height = 40cm

circumference =
$\pi \: r {}^{2} h$

12 = 22/7 ×r^2 × 40
21/220 = r^2

volume of cylinder =pi ×r^2 ×h
= 22/7 ×21/220 ×40
= 12cm^3