![A takes as much time as B and C together to complete a work. While A and B together can do this piece of work in 10 days](https://www.gkseries.com/blog/wp-content/uploads/2024/04/A-takes-as-much-time-as-B-and-C-together-to-complete-a-work.-While-A-and-B-together-can-do-this-piece-of-work-in-10-days.jpg)
A takes as much time as B and C together to complete a work. While A and B together can do this piece of work in 10 days. C alone can do this piece of work in 50 days. In how many days will this work be completed by B alone?
(a) 20 days
(b) 28 days
(c) 30 days
(d) none of these
Sol:
![](https://www.gkseries.com/blog/wp-content/uploads/2024/04/image-49-1024x734.png)