A wall is built using bricks that are 30 cm long and 20 cm high. The wall measures 1.5 m in length and 0.4 m in height. How many bricks are required to build the wall?

Step-by-step solution

1. Convert the wall dimensions to centimetres: $1.5\text{m}=150\text{cm}$ and $0.4\text{m}=40\text{cm}$.
2. Find how many bricks fit along the length: $150\text{cm}÷30\text{cm}=5$ bricks.
3. Find how many bricks fit along the height: $40\text{cm}÷20\text{cm}=2$ bricks.
4. Multiply the bricks along length by those along height: $5\times 2=10$ bricks.
5. Thus the wall requires 10 bricks.

Concept tested: Counting bricks to cover a wall

Published 10 October 2026 · How this solution was prepared and checked