A well with inner radius 3m, is dug 6 m deep. The soil taken out of it has been spread evenly all around it to a width of 2 m to form an ambankment. The height (in m) of the ambankment is:
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Correct answer: D
Explanation
The correct answer is option 4 i.e. 3
The volume of the soil dug out = volume of the embankment.
22/7 × 3 × 3 × 6 = 22/7(52 - 32) × h
54 = 16 × h
h = 54/16 = 3.