Multiple choice

Present ages of Richa and her husband are in ratio 3 : 4. Five years from now, ages of her husband and her son will be in ratio 3 : 1. If the present age of Richa is 21 years, then what will be her son's present age (in years)?

  1. 16

  2. 11

  3. 6

  4. 5
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Richa's age is 21. Given the ratio of Richa to her husband is 3:4, her husband's age is (21/3)*4 = 28. In 5 years, the husband will be 33. The ratio of husband to son is 3:1, so the son's age in 5 years will be 33/3 = 11. Therefore, the son's present age is 11 - 5 = 6.

AI explanation

Since Richa and her husband are in a 3 to 4 ratio and Richa is 21, her husband's age is 21 divided by 3 multiplied by 4, which equals 28. In five years, the husband's age will be 33. The ratio of the husband's age to the son's age in five years will be 3 to 1, meaning the son's age in five years will be 33 divided by 3, which is 11. Subtracting 5 from 11 gives the son's present age of 6 years.

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