Question

he present ages of Chetna and Shikha are in the ratio of 5:7 respectively. After 7 years, their ages will be in the ratio of 11:14 respectively. What is the difference between their ages?

Answer 1

Chetna : Shikha = 5:7

5x 7x

After 7 years, Ratio = 11:14

(5x+7)/(7x+7) = 11/14

Cross Multiplication,

70x + 98 = 77x +77

7x = 21

x= 3

Present age of Chetna = 5x = 5*3 = 15 years

Present age of Shikha = 7x = 7*3 = 21 years

Difference between ages = 21 - 15 = 6 Years