A cylindrical water tank has a radius of 1 m and a height of 3 m. It is completely full. How many litres of water does it contain? (Use π = 3.14 and 1 m³ = 1000 litres).

Step-by-step solution

1. Step 1: Compute the area of the circular base: $A=\pi r^2=3.14\times 1^2=3.14$ m².
2. Step 2: Multiply the base area by the height to get volume: $V=A\times h=3.14\times 3=9.42$ m³.
3. Step 3: Convert cubic metres to litres: $9.42\times 1000=9420$ litres.

Concept tested: Volume of a cylinder

Published 13 October 2026 · How this solution was prepared and checked