Cross-section 8171

How many m3 of soil is to be excavated when digging a 120 m long ditch, the cross-section of which is an isosceles trapezoid with bases of 2.3 m and 3.3 m, if the depth of the trench is 90 cm?

Correct answer:

V =  309.42 m3

Step-by-step explanation:

l=120 m a=2.43 m c=3.3 m h=90 cm m=90:100  m=0.9 m  S1=2a+c h=22.43+3.3 0.9=2.5785 m2 V=S1 l=2.5785 120=5015471 m3=309.42 m3

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