Displaying Data, SM-Bank 015

The picture graph shows how many tonnes of concrete are needed for 4 jobs.

How many more tonnes of concrete does Job 1 need than Job 3? (2 marks)

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\(2\ \text{tonnes}\)

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\(\text{Job 1 needs 9 tonnes}\)

\(\text{Job 2 needs 7 tonnes}\)

\(\therefore\ \text{Extra tonnes}\)	\(=9-7\)
	\(=2\ \text{tonnes}\)