Multiple choice

The ratio of age of Rahul and Vimal 4 years ago is 4 : 3. The ratio of sum and difference of their present age is 9 : 1. What will be the age of Vimal after 4 years?

  1. 16 years

  2. 20 years

  3. 18 years

  4. 22 years

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

Let ages 4 years ago be 4x and 3x. Present ages: (4x+4) and (3x+4). Sum = 7x+8, Difference = x. Given (7x+8)/(x) = 9/1, so 7x+8 = 9x, giving x = 4. Present ages: 20 and 16. Vimal is currently 16, so after 4 years, Vimal will be 20.