1.

A and B can do a work in 12 days, B and C in 30 days and C and A in 36 days. In how many days will the work be completed, if all three of them work together?

Answer»

180/13 DAYS



One DAY work of A and B = 1/12

One day work of B and C = 1/30

One day work of C and A = 1/36

2(A + B + C) = 1/12 + 1/30 + 1/36

2(A + B + C) = 13/90

(A + B + C) = 13/180

Number of days required = 180/13 days.



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