P and Q can finish in a work in 30 days. They worked at it for 10 days and q left the remaining work done by p alone in 20 more days. How long P take to finish the work alone?
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Answer:
20 days??? I think so
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the work done by both in 10 days will be done by p in 20 days
therefore,p takes 20+20 days =40 days to finish work alone
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