A, B and C can complete a piece of work in 24,6 and 12 days respectively.Working together, they will complete the same work in:

1/24 days
7/24 days
24/7 days
4 days

Correct Answer: 24/7 days

Explanation:

(A+B+C)'s 1 day's work = (1/24 + 1/6 + 1/12) = 7/24

so, A,B and C together will complete the work in 24/7 days.

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