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A can do a piece of work in 18 days. He worked at it for 12 days and B finished the remaining work in 8 days.B alone can do the whole work in
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Explanation:
18A=12A+8B
6A=8B
A\B=4\3
So, efficiency of A and B are 4, 3.
Total Work =18×4=72Units
So, B will do=72\3=24days