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Que. 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
Correct Answer:9(3/5)days
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