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The ratio of ages of Monu and Sonu at present is 4 ∶ 1. Eight years ago Monu's age was 10 times the age of Sonu. What is the present age of Monu?
1. 48
2. 44
3. 46
4. 42

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Correct Answer - Option 1 : 48

Given:

The ratio of ages of Monu and Sonu at present is 4 ∶ 1.

 Eight years ago Monu's age was 10 times the age of Sonu.

Calculation:

Let the present age of Monu and Sonu be 4x and x.

The age of Monu eight years ago = 4x - 8

The age of Sonu eight years ago = x - 8

According to the question;

⇒ 10( x - 8) = 4x - 8

⇒ 10x - 80 = 4x - 8

⇒ 6x = 72

⇒ x = 12

The present age of Monu = 4 × 12 = 48 years

∴ The present age of Monu is 48 years.

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