A and B entered into a business such that the sum invested by A is 2/5th of the total sum invested by both of them and A invested his sum for 8 months. The profit received by B is 3/7th of total profit received by A and B together. Find the time for which B invested his sum?
1
8 months
2
4 months
3
6 months
4
12 months
5
None of these