Volume, SM-Bank 127

The composite prism below is made up of two right triangular prisms.

Calculate the volume of the composite prism in cubic metres. (2 marks)

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\(4230\ \text{m}^3\)

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\(\text{Area of cross-section }(A)\)	\(=\ \text{Triangle 1 + Triangle 2}\)
	\(=\Bigg(\dfrac{1}{2}\times 6\times 18)\Bigg)+\Bigg(\dfrac{1}{2}\times 21\times 15\Bigg)\)
	\(=54+157.5\)
	\(=211.5\ \text{m}^2\)