The proportion between the current ages of A and B is 6 7 If B is 4 years elder than A what will be ...........

Quantitative Aptitude ( CCS) Ratio, Proportion

The proportion between the current ages of A and B is 6:7. If B is 4 years elder than A, what will be the proportion of the ages of A and B after 4 years?

7:8

3: 4

4: 5

8: 2

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Explanation:

If A’s age and B’s age = 6a and 7a years respectively
Then B is 4 years elder than A
=> 7a – 6a = 4
A = 4
After 4 years, A’s age = 6a + 4 years
And B’s age = 7a + 4
Needed ratio = 6a + 4 : 7a + 4
Replace the “a” value of 4
= 28 : 32
= 7 : 8