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Two drops of the same radius are falling...

Two drops of the same radius are falling through air with a steady velcoity of `5 cm s^(-1).` If the two drops coalesce, the terminal velocity would be

A

`4((2)/(3))xx5cm//s`

B

`4^((1)/(3))cm//s`

C

`5^((1)/(2))xx4cm//s`

D

`4^((1)/(3))xx5cm//s`

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The correct Answer is:
A
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ALLEN -ELASTICITY, SURFACE TENSION AND FLUID MECHANICS-Exercise 1 (Fluid Statics)
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