pls help me to solve this question class 8 ch 13 time and work
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Piece of work done by A, B, C in one hour= 1/8
Piece of work done by A in one hour= 1/15
Piece of work done by B in one hour= 1/20
Time taken by C to do the work =1/8-(1/15+1/20)
=1/8-7/60
=1/120
= 120 hours.
Hope I help you.
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