A rectangular garden of dimensions 1.5 m by 0.8 m is to be covered with bricks each 20 cm by 20 cm. How many bricks are required?

Step-by-step solution

1. Convert the dimensions of the garden to centimeters: $1.5\text{ m}=150\text{ cm}$ and $0.8\text{ m}=80\text{ cm}$.
2. Compute the area of the garden: $150\text{ cm}\times 80\text{ cm}=12000{\text{ cm}}^2$.
3. Compute the area of one brick: $20\text{ cm}\times 20\text{ cm}=400{\text{ cm}}^2$.
4. Divide the total area of the garden by the area of one brick: $12000div400=30$.
5. Hence 30 bricks are needed.

Concept tested: Area of rectangle

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