Rates, SM-Bank 024

Gary used 4 litres of paint to paint a wall.

The wall was a rectangle 2 metres high and 3 metres wide.

How many litres of paint would he need to paint a rectangular wall which is 3 metres high and 5 metres wide? (2 marks)

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\(10\)

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\(\text{Area of smaller wall}\)

\(= 2\times 3\)

\(= 6\ \text{m}^2\)

\(\text{S}\text{ince 4 litres of paint are needed to}\)

\(\text{paint the small wall:}\)

\(\rightarrow\ \text{Paint needed for 1 m}^2\)

\(= \dfrac{4}{6}\)

\(= \dfrac{2}{3}\ \text{litre}\)

\(\rightarrow\ \text{Area of larger wall}\)

\(= 3\times 5\)

\(= 15\ \text{m}^2\)

\(\text{Paint needed}\)	\(= 15\times \dfrac{2}{3}\)
	\(= 10\ \text{litres}\)