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A dimensionally consistent relation for the volume `V` of a liquid of coefficiet of viscosity `eta` flowing per second through a tube of radius `r` and length `l` and having a pressure difference `p` across its end, is

A

`V=(pi pr^(4))/(8eta l)`

B

`V=(pi eta l)/(8 pr^(4))`

C

`V=(8p eta l)/(pi r^(4))`

D

`V=(pi p eta)/(8 l r^(4))`

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