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A man raises a load of 360kgf using a block and tackle system of 3 pulleys.

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A man raises a load of 360kgf using a block and tackle system of 3 pulleys. If the efficiency of the pulley system is 60%, what effort is applied by the man?

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Given: L = 360kgf, E = ?, Efficiency =  60%  = 0.6,

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