A task can be completed in pairs among three persons p, q, r as follows: p and q take 60 days; q and r take 120 days; p and r take 90 days. In how many days can the task be completed if p, q, and r work together?
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A work can be completed by P and Q in 12 days. Q and R in 15 days. R and P in 20 days. In how many days P alone can finish the work ?
A) 10 days
B) 20 days
C) 30 days
D) 60 days
Correct Answer:
C) 30 days
BhaveshMalviya:
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LCM of 60,90,120 - 360
6,4,3=13
360*2/13. this is the answer
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