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
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Length 200 m, side slope 2: 1, depth of trench 4 m, bottom, width of trench 1.5 m. Cost of earth work Rs. 50 per m3. Cross sectional area
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volume of excavation will be 618.66 m^3
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