Calculate the volume of the composite prism below, giving your answer in cubic centimetres. (2 marks)
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\(\text{Convert measurements from mm to cm before calculations}\)
| \(\text{Area of cross-section }\) | \(=\ \text{Trapezium + Triangle}\) |
| \(=\Bigg(\dfrac{0.9}{2}\times(2.4+1.2)\Bigg)+\Bigg(\dfrac{1}{2}\times 2.4\times 1.5\Bigg)\) | |
| \(=1.62+1.8\) | |
| \(=3.42\ \text{cm}^2\) |
| \(V\) | \(=A\times h\) |
| \(=3.42\times 2.1\) | |
| \(=7.182\ \text{cm}^3\) |