Question

One year ago, the ratio of the age (in years) of A to that of B was 4 : 3. The ratio of their respective ages. 3 years from now. will be 6 : 5. What will be the ratio of respective ages of A and B. 9 years from now?

विकल्प

• 7 : 6

• 10 : 9

• 9 : 8

• 8 : 7

Answer 1

9 : 8

Explanation:

	A	:	B
Past —	4		3
	`↑` 1	:	`↑` 1
Present —
	`↓` 3		`↓` 3
Future —	6	:	5

⇒ : 2 `->` 4

    : 1 `->` 2

∴ Required = (6 × 2 + 6) : (5 × 2 + 6)

= 18 : 16

= 9 : 8