Rates, SM-Bank 022

Patrick uses 25 litres of water every minute when he has a shower.

Kate uses 150 litres of water when she has a bath.

How many fewer litres of water does Patrick use in his 5½ minute shower than Kate does in her bath? (2 marks)

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\(12.5\ \text{litres}\)

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\(\text{Patrick water usage}\)

\(= 5.5\times 25\)

\(= 137.5\ \text{litres}\)

\(\therefore\ \text{Less litres}\)	\(= 150-137.5\)
	\(=12.5\ \text{litres}\)