How many cubic meters of earth must be dug out to sink half depth of a well 7350 cm deep and of diam

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21 Oct 2020 Volume

How many cubic meters of earth must be dug out to sink half depth of a well 7350 cm deep and of diameter 9 m.

OPtion

1) 4677.75
2) 4617.75
3) 4627.75
4) 4577.75
5) 4671.75
6) 2398.875
7) 2388.875
8) 2378.875
9) 2338.875
10) None of these

Solution

7350 cm = 73.5 m
Volume of well = Pi*r^2*h
= (22/7)*4.5^2*73.5/2 = 2338.875

Correct Option: 9 Best Solution (1)