A and B working together can finish a piece of work in 12 days while B alone can finish it in 30 days. In how many days can A alone finish the work?
- 18 days
- 20 days
- 24 days
- 25 days
Let the work be 60 units. (LCM of 12 and 30)
A and B working together can finish 60 units of work in 12 days.
So, one day work of A and B = 5 units
B alone can finish 60 units of work in 30 days.
So, one day work of B alone = 2 units
One day work of A alone = 5 units - 2 units = 3 units
A lone can complete 60 units of work in 20 days.
The correct option is B.