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The coefficient of viscosity of a liquid...

The coefficient of viscosity of a liquid flowing through a narrow tube is given by `eta=(pipr^(4))/(8Vl)` where r and `l` are the radius and the length of the tube p is the pressure difference between its two ends and V is the volume of liquid flowing per unit time. Here the values of p,r,V and `l` are 75 cm Hg, 0.35 cm, 1.5 `cm^(3)//s` and 20.5 cm. respectively , the errors in their measurement are 0.1 cm Hg. 0.01 cm, 0.1 `cm^(3)//s` and 0.1 cm. respectively. Estimate the percentage error in the computed value of `eta`.

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The correct Answer is:
0.177
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