A alone can finish a piece of work in 36 days. B is 20% more efficient than A. C is 50% more efficient
than B. In how many days A and C working together can finish the same piece of work ? (in days)
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atul7584:
12 nahi hoga
upstream by the boat in the same time. What is the speed of the current ? (in kmph)
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90/7days will be the answer
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