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A body of mass explodes at rest break up...

A body of mass explodes at rest break up into three parts. If two parts having equal masses fly off perpendicularly to each other with a velocity of `18 m//s`, then calculate the velocity of the third part which has a mass `3` times the mass of each part.

A

`6sqrt m//second 135^@ ` from either

B

`6sqrt2 m//second and 45^@` from either

C

`frac(6)(sqrt2) m//second and 45^@` from either

D

`frac(6)(sqrt2) m//second and 45^@` from either

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