A dimensionally consistent relation for the volume V of a liquid of coefficient of viscosity 'n' flowing per second , through a tube of radius r and length l and having a pressure diffrence P across its ends is?

Q. A dimensionally consistent relation for the volume V of a liquid of coefficient 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

Q. A dimensionally consistent relation for the volume V of a liquid of coefficient 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

Q. The volume of a liquid (v) flowing per second through a cylindrical tube depends upon the pressure gradient (p/l) radius of the tube (r) coefficient of viscosity ($\eta$) of the liquid by dimensional method the correct formula is