Multiple choice

The ratio of present age of Sita and Her son is (5 : 2) respectively. Seven year hence, the ratio will be (2 : 1). what was the age of Sita When her son was born ?

  1. 28 years

  2. 35 years

  3. 21 years

  4. data insufficient

  5. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let Sita's present age be 5x and her son's present age be 2x. After 7 years: (5x+7)/(2x+7) = 2/1. Cross-multiplying: 5x+7 = 2(2x+7) = 4x+14. So 5x+7 = 4x+14, which gives x = 7. Son's present age = 2x = 14 years. When the son was born (14 years ago), Sita was 5x - 14 = 35 - 14 = 21 years old.