Working 2 hours in a day, P can complete a work in 10 days and working 5 hours in a day, Q can complete the same work in 6 days. Working 3 hours in a day, in how many days both P and Q together can complete the same work?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 4 days.
| Understading/Application |
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P complete work in 20 hours and Q complete in 30 hours. Let total work to be done = L.C.M.(20,30) = 60 units |
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P's efficiency = 60/20 = 3units/hr and Q's efficiency = 60/30 = 2 units/hr If they work 3 hours in a day, work done by them = 3(3 + 2) = 15 units Number of days taken = 60/15 = 4 days |