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) 25 months B) 11 months C) 16 months D) 10 months E) 12 months
7x5: 5xk = 7:10   k = 10 months   Answer: 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 ?