A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in:
A. 9-1/5 days
B. 9-2/5 days
C. 9-3/5 days
D. 10
Answer: C.
Time and Work
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