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Question
A, B and C can complete a work in 81 days. A and B together can complete the same work in 97.2 days. B and c together can complete the same work in 162 days. B alone can complete the work in how many days?
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Answer
C 1 day work= 1/81-1/97.2=1/486
B 1 day work=b+c 1 day work-c 1 day work=1/162-1/486= 2/486
So b can do alone in 243 days
