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Today is Ketan's birthday. One year from...

Today is Ketan's birthday. One year from today he will be twice as old as he was 10 years ago. How old is Ketan today?

A

19 years

B

20 years

C

21 years

D

22 years

Text Solution

Verified by Experts

The correct Answer is:
C
Suppose the present age of Ketan is x years.
According to question
x + 1 = 2 (x-10)
or, x + 1 = 2x - 20 or, 2x - x = 20
`:.x=21` years
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