The ratio of Teja’s and his mother’s present ages is 7 : 11. The difference between their ages is 20 years. The age of Teja after 3 years will be:

Correct option is C

Given: 

Ratio of age of Teja and his mother = 7 : 11 

Difference between their age = 20 years 

Solution: ​

Let the age of Teja be 7x and his mother be 11x 

So, 

11x - 7x = 20

4x = 20 

x = $$\frac{20}{4}$$ 

x = 5 

Present age of Teja = 7 $$\times$$ 5 = 35 years

Thus, Teja's age after 3 years = 35 + 3 = 38 years