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Question

P can complete a work in 12 days working 8 hours a day. Q can complete the same work in 8 days working 10 hours a day. If both P and Q work together, working 8 hours a day, in how many days can they complete the work?


  1. 7


Solution

The correct option is C


P can complete the work in 12×8 hrs. = 96 hrs

Q can complete the work in 8×10 hrs. = 80 hrs
∴ P’s 1 hour’s work = 196 and Q’s 1 hours work = 180

Work done in one hour =  11480

Work done in 8 hours = 1160

Complete work will be done in 6011days.

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