Discussion Forum
Que.  A can do a piece of work in 4 hours; B and C together can do it in 3 hours, while A and C together can do it in 2 hours. How long will B alone take to do it? 
a.  8 hours 
b.  10 hours 
c.  12 hours 
d.  24 hours 
Correct Answer:12 hours
