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A lift is used to carry boxes to the top of a hotel 20m high.A...

A lift is used to carry boxes to the top of a hotel 20m high.A total weight of 100kg of boxes were carried in 20s.If the useful output of the engine during the lift mechanism is 1.2kw.Calculate the efficiency of the lift mechanism.( g=10m/s^2)?
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Asked by peace on 29th October, 2020
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