question_answer

A body of mass m kg is lifted by a man to a height of one metre in 30 sec. Another man lifts the same mass to the same height in 60 sec. The work done by them are in the ratio                                             [MP PMT 1993]

A)             \[1:2\]  

B)             1 : 1

C)             2 : 1    

D)             4 : 1