The ratio of investments of two partners P and Q is 7:5 and the ratio of their profits is 7:14. If P invested the money for 5 months, find for how much time did Q invest the money? Pick:
A) 19	B) 14	C) 13	D) 10	E) 12

Rationale: "7 * 5 : 5 * x = 7 : 14 x = 14 answer : b"
Answer: B