Question

The ratio between the present ages of Anu and Balbir is 5: 3, respectively. The ratio between Anu's age 4 years ago and Balbir's 4 years hence is 1: 1. What is the ratio between Anu's age 4 years hence and Balbir's age 4 years ago?

विकल्प

• 4: 1

• 2: 4

• 3: 2

• 3: 1

Answer 1

3: 1

Explanation:

Anu : Balbir  = 5 : 3 ⇒ 5x : 3x

Anu's age 4 years ago and Balbir = 1 : 1

`=(5"x"-4)/(3"x"+4)=1/1`

= 2x = 8  = x = 4

Present ages = 20 : 12

Anu's 4 years hence : Balbir 4 years ago

= 24 : 8 = 3 : 1