The trench

Calculate how many cubic meters of soil needs to be removed from the excavation in the shape of an isosceles trapezoid, the top width is 3 meters, the lower width is 1.8 m, the depth of the excavation is 1 m, and the length is 20 m.

Correct result:

V =  48 m3

Solution:

l=20 m a=3 m c=1.8 m h=1 m  S=a+c2 h=3+1.82 1=125=2.4 m2  V=S l=2.4 20=48 m3



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