A rectangular block of land has width 50 metres and length 85 metres.
In order to build a house, the builders dig a hole in the block of land.
The hole has the shape of a right-triangular prism, \(ABCDEF\).
The width \(AD\) = 20 m, length \(DC\) = 25 m and height \(EC\) = 4 m are shown in the diagram below.
Calculate the volume of the right-triangular prism, \(ABCDEF\), giving your answer in cubic metres. (2 marks)
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