A man of mass 80kg carrying a load of 20kg walks up a stair case in 20s. If the number of steps is 40 and width and height of each step are 20cm and 15cm respectively. The efficiency of the man is

A man of mass 80kg carrying a load of 20kg walks up a stair case in 20

1.	A man of mass 80kg carrying a load of 20kg walks up a stair case in 20s. If the number of steps is 40 and width and height of each step are 20cm and 15cm respectively. The efficiency of the man is
Answer» <html><body><p>0.2<br/>0.25<br/>0.4<br/>0.5</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/b-387190" style="font-weight:bold;" target="_blank" title="Click to know more about B">B</a></body></html>