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After 20 years, Manoj will be 5 times as old as he is now. Find his present age.

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Bihar STET Paper I: Mathematics (Held In 2019 - Shift 1)
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  1. 4 years
  2. 5 years
  3. 6 years
  4. 3 years

Answer (Detailed Solution Below)

Option 2 : 5 years
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Detailed Solution

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Calculation:

Let's denote Manoj's present age = X

After 20 years, his age = X + 20

According to the given data,

⇒ X + 20 = 5X

Subtracting X from both sides:

⇒ 20 = 4X

Dividing both sides by 4:

⇒ X = 5

∴ The present age of Manoj is 5 years.

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