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At present the ratio between the ages of Suma and Vanaja is 5 ∶ 7. After 8 years, Suma's age will be 28 year what is the age of Vanaja at present?
1. 20 years
2. 28 years
3. 24 years
4. 19 years

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Correct Answer - Option 2 : 28 years

Given: 

The ratio between the ages of Suma and Vanaja is 5 ∶ 7.

After 8 years, Suma's age will be 28 years

Calculation: 

Let the present age of Suma is 5x years and Vanaja is 7x years

According to the question, 

The age of Suma after 8 years is 

⇒ 5x + 8 = 28

⇒ 5x = 28 - 8

⇒ 5x = 20

⇒ x = 20/5

⇒ x = 4

So, 

The present of Vanaja is 

⇒ 7 × 4

⇒ 28 years 

∴ The present age of Bala is 28 years.  

Hence, the correct answer is "28 years".

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