Question

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:

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Answer 1

2.  

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 days

5

[B].  

9 2 days

5

[C].  

9 3 days

5

@

[D]. 10

Answer: Option C

Explanation:

(A + B + C)'s 1 day's work = 1 ,

4

A's 1 day's work = 1 ,

16

B's 1 day's work = 1 .

12

Therefore C's 1 day's work = 1 - ( 1 + 1 ) = ( 1 - 7 ) = 5 .

4 16 12 4 48 48

So, C alone can do the work in 48 = 9 3 days