Sachin is younger than Rahul by 7 years. If the ratio of their ages is 7:9, find the age of Sachin  Choose the correct choice from the following answers:
A) 24.58
B) 24.5
C) 24.3
D) 24.9
E) 24.1

Rationale: "if rahul age is x , then sachin age is x - 7 , so ( x - 7 ) / x = 7 / 9 = > 9 x - 63 = 7 x = > 2 x = 63 = > x = 31.5 so sachin age is 31.5 - 7 = 24.5 answer : b"
Answer: B