A man weighing 60 kg lifts a body of mass 15 kg to the top of a building 10 m high in 3…
Physics · JEE Main · NTA Exams — Work, Energy and Power
A man weighing 60 kg lifts a body of mass 15 kg to the top of a building 10 m high in 3 minutes. His efficiency is
- 20%
- 10%
- 30%
- 40%
Answer
(A) 20%
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