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Q.

The cylindrical tube of a spray pump has a cross-section of 8cm2 , one end of which has 40 fine holes each of area 10-8 m2 . If the liquid flows inside the tube with a speed  of 0.15 m-rnin-1 , the speed with which the liquid is ejected through the holes is :

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a

50 ms-1

b

5 ms-1

c

0.05 ms-1

d

0.5 ms-1

answer is B.

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Detailed Solution

A1v1=A2v2⇒(40×10-8)v=(8×10-4)×0.1560⇒v=5 ms-1
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