Correct Answer: Option C

Explanation

Efficiency = \(\frac{ma}{V.R}\) x \(\frac{100}{1}\)

V.R = number of pulleys = 6

ma = \(\frac{\text{Load}}{\text{Effort}}\) = \(\frac{200}{50}\) = 4

Effiecieny = \(\frac{4}{6}\) × 100 = 66.67%

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