A) 50%
B) 75%
C) 33%
D) 90%
Correct Answer: B
Solution :
Efficiency of the system is \[\eta =\frac{output\,work}{input\,work}\] Input work = Fs \[=250\times 12\] Output work = mgh \[=75\times 10\times 3\] So, \[\eta =\frac{75\times 10\times 3}{250\times 12}=0.75=75%\]You need to login to perform this action.
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