The shape of the cross section of a canal is a trapezium. If the canal is
10 m wide at the top, 6 m wide at the bottom and the area of its cross section is 640 m², find the depth of the canal.
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It is given that; the cross-section of a canal is in the form of a trapezium and the canal top is 10 m wide and the bottom is 6 m wide. Let a be the length of canal top, b be the length of the bottom part and h be the depth of the canal. Thus, we get a=10 and b=6 .
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