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 20 months, find for how much time did Q invest the money?  Answers:
A) 11 B) 40 C) 18 D) 16 E) 12
7*5: 20*x = 7:10   x = 40   Answer:40
<result>B</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 20 months, find for how much time did Q invest the money?