Question

A can do a piece of work in 80 days. He works at it for 10 days and then B alone finishes the work
in 42 days. The number of days taken by the two together to finish the work, is
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Answer 1

Answer:

can do a piece of work in 80 days. He works at it for 10 days and then B alone finishes the remaining work in 42 days. In how many days can the two