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A tube of length 1 and radius R carries ...

A tube of length 1 and radius R carries a steady flow of fluid whose density is `rho` and viscosity `eta`. The velocity v of flow is given by `v=v_(0)(1-r^(2)//R^(2))` Where r is the distance of flowing fluid from the axis.

A

`4pi etalV_(0)`

B

`2pietalV_(0)`

C

`pietalV_(0)`

D

`(2)/(3)pi etalV_(0)`

Text Solution

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The correct Answer is:
A
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