A running man has half the kinetic energy that of a boy whose mass is half the mass of the man. The man speeds up by 
and then has the same kinetic energy as that of boy. The original speeds of man and boy (in 
) respectively, are
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
According to the question,
…(i)
where, 
speed of man and 
speed of boy.
Now, 
…(ii)
Solving Eqs. (i) and (ii), we get
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