Multiple choice

The ratio of the present ages of H and K is 15:20. If the sum of their ages is 70, then what will be K's age after 10 years?

  1. 40

  2. 35

  3. 50

  4. 45

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

The ratio of H and K is 15:20, which simplifies to 3:4. Their total age is 70 years. Using the ratio, H's age = (3/7) × 70 = 30 years, K's age = (4/7) × 70 = 40 years. After 10 years, K's age will be 40 + 10 = 50 years.