A, B and C can do a work separately in 18, 36 and 54 days, respectively. They started the work together, but B and C left 5 days and 10 days, respectively, before the completion of the work. In how many days was the work finished?
A. 15 days
B. 13 days
C. 14 days
D. 12 days
Answer: Option B
Solution (By Examveda Team)

If B worked 5 days more = 3 × 5 = 15 unit
If C worked 10 days more = 2 × 10 = 20 unit
Now, total work = 108 + 15 + 20 = 143
(A + B + C) = $$\frac{{143}}{{11}}$$ = 13 days
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