How many more days are required to complete the work?
Explanation:
Assume, C can do x work in 1 day; B can do 2x work in 1 day; and A can do 4x work in 1 day.
Total work = 12(x + 2x + 4x) = 84x
A and B work for 8 days, 8(2x + 4x) = 48x will be completed.
B and C can do 3x work in 1 day.
So, the remaining 36x can be completed in 12 days.
Hence, option (c).
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