LOADING
Question

Excavation is to be made for a reservoir measuring 20 m long, 12 m wide at the bottom and 2 m deep. The side-slopes are to be 1:1 and the top to be flush with the ground which is level in the vicinity as per prismoidal formula, the volume of excavation will be:

A.

610.33 m3

B.

618.66 m3

C.

625.00 m3

D.

633.66 m3

Answer ( Option B)

618.66 m3

Solution

For the calculation of volume by prismoidal formula, consider three levels at common interval 1m. The areas of these levels at the bottom, mid and top are as follows-


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