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ICSE Class 10 Physics 2017 Solved Paper

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Question : 31
Total: 65
Efficiency of the pulley system.
Solution:  
Efficiency(η)‌=‌
‌ M.A. ‌
‌ V.R. ‌
×100%
‌=‌
3.5
4
×100%=87.5%
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