The present ages of Shanthi and Keerthi are in the ratio of 7 : 3. After 5 years, Shanti's age will be 40. How old will Keerthi be after 5 years?

The present ages of Shanthi and Keerthi are in the ratio 7 : 3.

After 5 years, Shanthi’s age will be 40.

Let Shanthi’s age be 7x and Keerthi’s age be 3x.

According to the question, after 5 years, Shanthi’s age will be 40.

7x + 5 = 40

7x = 40 – 5

7x = 35

x = 5

So,

Present age of Keerthi = 3x = 3 × 5 = 15 year

Keerthi’s age after 5 years = 15 + 5 = 20 year

Thus,Keerthi will be 20 years old after 5 years.