Two horizontal plates placed 250mm have an oil of viscosity 20 poises. Calculate the shear stress in oil if upper plate is moved with velocity of 1250mm/s.

Two horizontal plates placed 250mm have an oil of viscosity 20 poises.

1.	Two horizontal plates placed 250mm have an oil of viscosity 20 poises. Calculate the shear stress in oil if upper plate is moved with velocity of 1250mm/s.
A.	20 N/m<sup>2</sup>
B.	2 N/m<sup>2</sup>
C.	10 N/m<sup>2</sup>
D.	None of the mentioned
Answer» D. None of the mentioned