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:
A. 1/24 days
B. 7/24 days
C. 24/7 days
D. 4 days
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Work Rate of A = 100/24 = 4.16% per day.
Work Rate B = 100/6 = 16.66% per day.
Work rate of C = 100/12 = 8.33% per day.
Work Rate (A + B +C) = 4.16 + 16.66 + 8.33 = 29.15% per day.
So, they can complete the work together in,
100/29.15 = 3.43 days = 24/7 days.
c