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Two sopheres whose radii are in the rati...

Two sopheres whose radii are in the ratio `1:2` are moving with theier velocities in the ratio 3:4. If their densities are in the ratio 3:2, the ratio of their kinetic energies is

A

27 : 64

B

`1 : 1`

C

27 : 256

D

`9 : 64`

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The correct Answer is:
C
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