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Question
The figure shows the cross section of 0.2 m a concrete wall to be constructed. It is 0.2 m wide at the top, 2.0 m wide at the bottom and its height is 4.0 m, and its length is 40 m. Calculate the volume of the concrete in the wall
Solution
Area of the cross section of the wall
= 4.4 sq.m ....from (a)
Volume of the wall
= Area of the cross section x length
= 4.4 x 40
= 176m3
∴ Volume of the wall is 176m3.
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