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A can do a piece of work in 15 hours and B can do it in 30 hours. In how much time will they finish the whole work working together? |
10 hours 09 hours 08 hours 5 hours |
10 hours |
Total work = Efficiency × Number of days time taken by A & B together to do work = \(\frac{30R}{3R}\) = 10 days |
