A cylindrical water tank is open at the top

MATHEMATICS · Subjective · CBSE · Mathematics · Surface Areas and Volumes · Surface Areas and Volumes

Problem

A cylindrical water tank is open at the top. Its inner radius is

2.1\,\text{m}

and its height is

3.5\,\text{m}

. How much area of its inside surface must be waterproofed? (Take

\pi = 22/7

and give the answer in

\text{m}^2