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Water flows through a horizontal pipe of...

Water flows through a horizontal pipe of varying cross-section at the rate of 20 litres per minutes , determine the velocity of water at a point where diameter is `4 cm`

A

`0.2639 ms^(-1)`

B

`0.5639 ms^(-1)`

C

`0.4639 ms^(-1)`

D

`0.3639 ms^(-1)`

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The correct Answer is:
B
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