Question

Ria is 4 years elder to Rahul. After 10 years, the ratio of the ages of Rahul to Ria is 9:10. Find Rahul’s present age ? ​

Answer 1

Let the present ages of Tanya and Rahul be 3x years and 4 years.

II. After 5 years. (Tanya's age) : (Rahul's age) = 4 : 5.

III. (Rahul's age) = (Tanya's age) + 5

From I and II, we get 3x+54x+5=453x+54x+5=45 Correct answer is (E).

Answer 2

Given :–

Ria is 4 years elder to Rahul.

After 10 years, the ratio of the ages of Rahul to Ria is 9:10

To find :–

Find Rahul's present age.

Solution :–

Let, the age of Ria be x years and the age of Rahul be (x+4) years

After 10 years,

Afe of Ria = (x + 10) years

Age of Rahul = (x + 14) years

ATQ :—

$\sf{\implies \dfrac{x+10}{x+14} = \dfrac{9}{10}} \\ \\ \sf{\implies 10x+100=9x+126} \\ \\ \sf{\implies 10x-9x=126-100} \\ \\ \sf{\implies x=26}$

.°. The present age of Ria is 26 years and

the present age of Rahul is = (26+4)=30 years.