Q.

The work done by pressure in forcing 2m3 of water through a pipe of radius 1 cm, if the pressure difference across a pipe is 105Pa is

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a

3×106J 

b

2×105J 

c

4×106J 

d

0.2×103J

answer is B.

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Detailed Solution

Given,

volume of water moved = 2m3

Pressure across the pipe = 105Pa

Radius of the pipe = 1cm

Work done = ?

W=F×s=P×A×s=P×V=2×105 J

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