question_answer

A body of mass \[{{m}_{1}}=\]4 kg moves at \[5\,i\,m\text{/}s\] and another body of mass \[{{m}_{2}}=2\,kg\] moves at \[10\,i\,\,m\text{/}s.\] The kinetic energy of centre of mass is

A)  \[\frac{200}{3}J\]                           

B)  \[\frac{500}{3}J\]

C)  \[\frac{400}{3}J\]           

D)         \[\frac{800}{3}J\]