The ratio of investments of two partners P and Q is 7:5 and the ratio of their profits is 7:10. If P invested the money for 5 months, find for how much time did Q invest the money?
Choose the correct choice from the following:  A) 22  B) 6  C) 17  D) 10  E) 88
7*5: 5*x = 7:10   x = 10   Answer:10
<result>D</result>
The ratio of investments of two partners P and Q is 7:5 and the ratio of their profits is 7:10. If P invested the money for 5 months, find for how much time did Q invest the money?