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A rain drop of radius 0.3 mm falls throu...

A rain drop of radius 0.3 mm falls through air with a terminal viscosity of `1 m s^(-1)`. The viscosity of air is `18 xx 10^(-5)` poise. The viscous force on the rain drop is

A

`2.05xx10^(-7)N`

B

`1.018xx10^(-7)N`

C

`1.05xx10^(-7)N`

D

`2.058xx10^(-7)N`

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The correct Answer is:
A
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