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A body initially at rest, breaks up into...

A body initially at rest, breaks up into two pieces of masses 2M and 3M respectively, together having a total kinetic energy E. The piece of mass 2M, after breaking up, has a kinetic energy

A

`(2E)/(5)`

B

`( E)/(2)`

C

`( E)/(5)`

D

`(3E)/(5)`

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