A block and tackle pulley arrangement has 6 pulleys in which an effort of 50N supports a load of 200N, calculate the efficiency of the machine

A block and tackle pulley arrangement has 6 pulleys in which an effort of 50N supports a load of 200N, calculate the efficiency of the machine
A. 80.0%
B. 76.6%
C. 66.7%
D. 60.7%

Correct Option: Answer is C

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