question_answer

A running man has half the KE to that of a boy of half the mass that man has. The man speeds up by \[1\text{ }m/s\] and then both have same KE. The original speeds of man and boy in m/s are :-

A)  \[(\sqrt{2}+1),\,(\sqrt{2}-1)\]            

B)  \[(\sqrt{2}+1),\,2(\sqrt{2}+1)\]

C)  \[\sqrt{2},\sqrt{2}\]       

D)  \[(\sqrt{2}+1),2\,(\sqrt{2}-1)\]