SOLUTION: P, Q, R together can build a house in 8 days. P & Q can build the house separately in 20 days & 24 days respectively. In how many days can R build the house alone?

SOLUTION: P, Q, R together can build a house in 8 days. P & Q can build the house separately in 20 days & 24 days respectively. In how many days can R build the house alone?

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Question 839592: P, Q, R together can build a house in 8 days. P & Q can build the house separately in 20 days & 24 days respectively. In how many days can R build the house alone?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
1/20+1/24+1/r=1/8
r=30 days alone

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