A pulley system has three pulleys in the fixed block and two in the movable block and if the pulley has an efficiency of 72%, the mechanical advantage of the system is?

A pulley system has three pulleys in the fixed block and two in the movable block and if the pulley has an efficiency of 72%, the mechanical advantage of the system is?
A. 36.0
B. 7.2
C. 5.0
D. 3.6

Correct Option: Answer is D
MA = E × Vr/100

So
MA = 72 × 5 = 360/100 = 3.6

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