P and Q can do a piece of work in 40 days. Q and R can do it in 120 days. Q alone could finish
it in 180 days. In how many days will P and R working together finish the work?
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P and Q can do a piece of work in 40 days. Q and R ... Q alone could finishit in 180 days. … Get ... In how many days will P and R working together finish the work?
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