What is Anil 39 s present age if after 20 years his age will be 10 times his age 10 years back ........

Quantitative Aptitude (CDS) Problems based on Ages

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What is Anil's present age, if after 20 years his age will be 10 times his age 10 years back?

6.2 years

7.7 years

13.3 years

10 years

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Explanation:

Let Anil present age be x
Anil age before 10 years = x - 10)
Anil age after 20 years = (x + 20)
We are given that, Anil age after 20 years (x + 20) is 10 times his age 10 years back (x – 10)
Therefore, (x + 20) = 10 (x – 10)
Solving the equation, we get x + 20 = 10x – 100
9x = 120, x = 13.3 years.