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

`10` cm per sec

B

`2.5` cm per sec

C

`5 xx (4)^(1//3)` cm per sec

D

`5 xx sqrt(2)`1 cm per sec

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The correct Answer is:

C

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