181. A and B together can complete a work in 15 days. A is 50% more efficient worker || edu214

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A can do a work in 15 days and B in 20 days. If they work on it together for 4 days, #mathsshorts A can do a work in 15 days and B in 20 days. If they work on it together for 4 days, #mathsshorts
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