Multiple choice

The ratio of present ages of Shyam and Sohan is 7: 8 respectively. Four year hence this ratio becomes 9: 10 respectively. What is Shyam's present age in years?

  1. 12

  2. 14

  3. 16

  4. 15

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

Let Shyam's present age = 7x, Sohan's present age = 8x. After 4 years: (7x+4)/(8x+4) = 9/10. Cross-multiply: 10(7x+4) = 9(8x+4), so 70x+40 = 72x+36, giving 2x = 4, thus x = 2. Shyam's present age = 7×2 = 14 years. Option B is correct.