A dimentionally consistent relation for the volume "V" of a liquid of cofficient of viscosity "n" per second through a tube of radius "r"and length "l" and having a pressure difference "P" across its end is 1.V=πPr4÷8nl 2.V=πn÷8Pr4 3.V=8Pn÷πr4 4.V=πPn÷8r4

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