Calculate the volume of the composite prism below in cubic metres. (2 marks)
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| \(\text{Area of cross-section }(A)\) | \(=\ \text{Rectangle 1 – Rectangle 2}\) |
| \(=(6\times 3)-(4\times 1)\) | |
| \(=18-4\) | |
| \(=14\ \text{m}^2\) |
| \(V\) | \(=A\times h\) |
| \(=14\times 11\) | |
| \(=154\ \text{m}^3\) |