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Question

Q42. If A and B together can compete a work in 18 days, A and C together in 12 days, and B and C together in 9 days, then B alone can do the work in


A

(a) 18 days

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B

(b) 24 days

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C

(c) 30 days

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D

(d) 40 days

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Solution

The correct option is B

(b) 24 days


(A+B)s one day work =118(B+C)s one day work =19(C+A)s one day work =1122(A+B+C)s one day work =2+4+336=14(A+B+C)s one day work =18Bs one day work =18112=3224=124B alone can do the work in 24 days


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