Luke wants to cover this wall with blue paint. 7 m
1.6 m
3.6 m
wall
door
6.1 m
He will buy blue paint in 2.5 litre tins.
Each 1 litre of blue paint will cover 8 m2 of the wall.
How many tins of blue paint does Luke need to buy?

First find the area of the wall by splitting it into two rectangles

The first rectangle is 7m x 1.6m=11.2m²

The second is (3.6m-1.6m) x 6.1m= 2m x 6.1m= 12.2m²

11.2m² + 12.2m²= 23.4m²

2.5 litres
1litre covers 8m²
So 2.5 x8 =20m ² covered by 2.5 litres

23.4 ÷ 20 =1.17 tins

So Luke needs to buy 2 tins of blue paint