Question

The ratio of the ages of A and B at present is 3 : 1. Four years earlier the ratio was 4 : 1. The present age of A is

Options

• 48 years

• 40 years

• 36 years

• 32 years

Answer 1

36 years

Explanation:

	A	:	B
Past	4 × 2	:	1 × 2
	`↑` 4		`↑` 4
Present	3 × 3	:	1 × 3

⇒ : 1 `->` 4

    : 9 `->` 36 years