Answers

2015-01-22T18:11:13+05:30
A alone can do work in = 4 hours
A and C together can do any work in = 2 hours
Then, if we subtract 4 by 2 , then we get the result 2.
So, C alone can do a work in 2 hours.

But, B together with C can do any work in = 3 hours
Then, B alone =(3+2) hours
                       
= 5 hours

Answer: B 
individually can do any work  in 5 hours.

1 4 1