Multiple choice

10 years ago, the age of Sita's mother was four times her age. After 10 years mother's age will be twice the daughter's age. What is Sita's present age?

  1. 5 years

  2. 10 years

  3. 20 years

  4. 30 years

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let Sita's present age be x. Ten years ago: Sita was (x-10), mother was 4(x-10). After 10 years from present: mother will be twice Sita's age. Mother's age from first statement = 4x-40+10 = 4x-30. Mother's age from second statement = 2(x+10)-10 = 2x+10. Equating: 4x-30 = 2x+10, giving 2x = 40, so x = 20 years.

Keep practicing — related questions