Area, SMB-009

Find the surface area of the rectangular prism pictured below, correct to 1 decimal place. All measurements are in metres. (2 marks)

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\(68.0\ \text{m}^2\)

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\(\text{S.A.}\)	\(=2 \times (2.8 \times 1.7) + 2 \times (2.8 \times 6.5) + 2 \times (1.7 \times 6.5) \)
	\(= 2(4.76 + 18.2 + 11.05) \)
	\(=68.02\)
	\(=68.0\ \text{m}^2\ \ \text{(1 d.p.)}\)