Callum has designed a brick with two identical triangular sections removed as shown in the diagram below.
Calculate the volume of the brick in cubic centimetres. (2 marks)
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| \(\text{Area of cross-section }(A)\) | \(=\ \text{Square – 2 × Triangle}\) |
| \(=(25\times 25)-2\times \Bigg(\dfrac{1}{2}\times 10\times 15\Bigg)\) | |
| \(=625-150\) | |
| \(=475\ \text{cm}^2\) |
| \(V\) | \(=A\times h\) |
| \(=475\times 40\) | |
| \(=19\ 000\ \text{cm}^3\) |