The ages of Charlie and Vaibhav are in the proportion of 3 : 5. After 9 years, the proportion of their ages will be 3 : 4. Then the current age of Vaibhav is:
Pick
A) 15 years
B) 16 years
C) 135 years
D) 21 years
E) 18 years
15 years   15 years   Charlie’s age = 315 years and   Vaibhav’s age = 515 years   { (315 years + 9)/(515 years + 9) }=3/4   =&gt; 4 (315 years + 9) = 3 (515 years + 9)   =&gt; 15 years = 3   Therefore, Vaibhav’s age = 15 years.
<result>A</result>
The ages of Charlie and Vaibhav are in the proportion of 3 : 5. After 9 years, the proportion of their ages will be 3 : 4. Then the current age of Vaibhav is: