A person of mass 50kg carrying a load of 20kg walks up a staircase. If the width and height of each step are 0.25m and 0.2m respectively, the work done by the man in walking up 20 steps is, (g= 10 ms^(-2))

A person of mass 50kg carrying a load of 20kg walks up a staircase. If

1.	A person of mass 50kg carrying a load of 20kg walks up a staircase. If the width and height of each step are 0.25m and 0.2m respectively, the work done by the man in walking up 20 steps is, (g= 10 ms^(-2))
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