Question

The ratio of the ages of A and B, 8 years ago, was 2 : 3. Four years ago, the ratio of their ages was 5 : 7. What will be the ratio of their ages 8 years from now?

विकल्प

• 5 : 6

• 3 : 4

• 7 : 8

• 4 : 5

Answer 1

4 : 5

Explanation:

A		B
2 × 2	:	3 × 2
`↑` 4		`↑` 4
5	:	7

 : 1 `->` 4

Now 

A		B
(5 × 4 + 12)	:	(7 × 4 + 12)
32	:	40
4	:	5