Sachin is younger than Rahul by 7 years. If their ages are in the respective ratio of 7 : 9, how old is Sachin?
Choices:
A) 22.5 years  B) 24.5 years  C) 12.5 years  D) 28.5 years  E) 29.5 years
Let Rahul's age be X years.   Then, Sachin's age = (X - 7) years.   Therefore (X - 7) / X	=	7/9   9X - 63 = 7X   2X = 63   X = 31.5   Hence, Sachin's age =(X - 7) = 24.5 years.   ANSWER:24.5 years
<result>B</result>
Sachin is younger than Rahul by 7 years. If their ages are in the respective ratio of 7 : 9, how old is Sachin?