Question

the cross section of a Canal is in the form of a Trapezium if the top of canal is 15 M wide the bottom is 8m and the area of cross section is 138 m square find its depth

Answer 1

area of a trapezium=1\2 ×sum of parallel sides × height
1\2×(15+8)×h = 138
1\2 × 23 × h = 138
h\2 = 138 ÷ 23
h= 6×2
therefore, depth(height) = 12 m


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