A and B can do a work in 40 days and 25 days respectively. They start the work together, but A left after some days and B finished the remaining work in 12 days. After how many days did A leave?
1
8
2
10
3
12
4
14
5
None of these
A and B can do a work in 40 days and 25 days respectively. They start the work together, but A left after some days and B finished the remaining work in 12 days. After how many days did A leave?