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Rohan alone can do a work in 10 days and Mohan alone can do the same work in 15 days. In how many days will they together complete the same work? |
6 days 5 days 4 days 7 days |
6 days |
Total work = LCM of 10, 15 = 30
Together they take $\frac{total\; work}{efficiency}$ = $\frac{30}{5}$ = 6 days |
