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A liquid having coefficient of viscosity...

A liquid having coefficient of viscosity 0.02 decapoise is filled in a container of cross-sectional area 20 m^2 viscous drag between two adjacent layers in flowing is 1 N, then velocity gradient is

A

`2.0 s^(-1)`

B

`2.5 s^(-1)`

C

`3.0 s^(-1)`

D

`3.5 s^(-1)`

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