A can do a piece of work in 15 days. B is 50% more efficient than A. B can finish it in
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Step-by-step explanation:
B can do work 50% efficient. it means A takes 50% more time than B.
it means A takes 150% of time while B takes 100%
150℅ = 15 days
1℅. = 1/10 days
100% = 100/10 days = 10days
Hence B will take 10 days
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