Q.

The radius of a well is 7m. Water in it is at a depth of 20m and depth of water column is 10m. Work done in pumping out water completely from the well is, (g = 10ms–2)

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a

38.5 MJ

b

38.5 KJ

c

46.2 MJ

d

385 MJ

answer is D.

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The radius of a well is 7m. Water in it is at a depth of 20m and depth of water column is 10m. Work done in pumping out water completely from the well is, (g = 10ms–2)