(c) The cross-section of a canal is shown in figure (iii) given below. If the canal is 8 m wide at the top and 6 m wide at the bottom and the area of the cross-section is 16.8 m2, calculate its depth.

Dear Student,

Area of trapezium = Half the sum of parallel sides×Perpendicular distance betwwen the parallel sidesArea of trapezium = 16.8 m216.8 = 12×8+6×h16.8 = 12×14×h16.8=7×hh=16.87 = 2.4m

Hope this information will clear your doubts about topic.

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