Problem Statement:
Three friends A, B, and C can do a piece of work in t hours working together. Working alone, A can do the work in 6 hours more, B in 1 how more, and C in twice the time if all working together. How long would it take to finish the work if all working together?
Problem Answer:
If all working together, three friends A, B, and C can do a piece of work in t = 2/3 hours or 40 minutes.
Solution:
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