The ratio of investments of two partners A and B is 7:5 and the ratio of their profits is 7:10. If A invested the money for 5 months, find for how much time did B invest the money ?  Select
A) 11 months
B) 9 months
C) 7 months
D) 10 months
E) 12 months
Explanation:   7x5: 5xk = 7:10   k = 10 months   ANSWER IS 10 months
<result>D</result>
The ratio of investments of two partners A and B is 7:5 and the ratio of their profits is 7:10. If A invested the money for 5 months, find for how much time did B invest the money ?