Composite Figures, SM-Bank 004

Find the perimeter of the figure below correct to one decimal place. (2 marks)

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\(905.2\ \text{cm (1 d.p.)}\)

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\(\text{Perimeter}\)	\(=2\ \text{straight sides}+\dfrac{3}{4}\ \text{circle}\)
	\(=2\times 9.8+\Bigg(\dfrac{3}{4}\times 2\pi r\Bigg)\)
	\(=19.6+\Bigg(\dfrac{3}{4}\times 2\pi \times 9.8\Bigg)\)
	\(=905.1556\dots\)
	\(=905.2\ \text{cm (1 d.p.)}\)