Multiple choice

The ratio of the father's age to the son's age is 4:1 respectively. If the product of their ages is 576 years. What will be the respective ratio of their ages after 5 years ?

  1. 39:12

  2. 53:19

  3. 53 : 17

  4. 4 : 1

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

Let father's age = 4x, son's age = x. Product: 4x × x = 576, so 4x² = 576, x² = 144, x = 12. Current ages: father = 48 years, son = 12 years. After 5 years: father = 53 years, son = 17 years. Ratio = 53:17. This checks out with the product constraint (48×12=576).

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