Question

The ratio of two numbers is 4:5. But, if each number is increased by 20, the ratio becomes 6:7. The sum of such numbers is:

विकल्प

• 90

• 95

• 100

• 60

Answer 1

90

Explanation:

Let the numbers be 4x and 5x.

According to the question,

`⇒(4"x"+20)/(5"x"+20)=6/7`

⇒ 28x + 140 = 30x + 120

2x = 20

 x = 10

⇒ Sum = 4x + 5x = 9x

= 9 × 10

= 90