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Q.
The ages of Krish 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:
A.
10
B.
13
C.
15
D.
18
View Answer
Correct choice: C
Explanation:
Krish’s age = 3A and Vaibhav’s age = 5A (3A+9)/(5A+9) = 3/4 => 4 (3A + 9) = 3 (5A + 9) => A = 3 Therefore, Vaibhav’s age = 15 years.
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