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What will be the present age of Karan, if after 12 years, he shall be 3 times as old as he was 4 years ago?

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20 years

12 years

18 years

14 years

answer is B.

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Detailed Solution

We have to find the present age of Kiran.
Let the present age be

x

.
Then,

4

years ago his age would have been

x − 4

years.
After 12 years his age will be

12 + x

years.
As per the question,

12 + x = 3 (x − 4)

⇒ 12 + x = 3 x − 12

⇒ x − 3 x = − 12 − 12

⇒ − 2 x = − 24

⇒ x = 12

So, it can be concluded that the present age of the person is 12 years.
Therefore, option 2 is correct.

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