two men can do a piece of work in 6 hours and 4 respectively. after the first man has worked for 2 hours he joined by the other. by when should the work be completed
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Given:
A can do a piece of work in 6 hours & B can do in 4 hours.
Hence, the Total time taken to be completed the work = 3 3/5=3 hrs 36 min.
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