Correct Answer - Option 3 : 42 years
Given:
The ratio of the ages of Khushi and her Aunt = 1 : 4
The ratio of the ages of Khushi’s Aunt and her brother = 9 : 1
Khushi’s brother = 5 years younger than Khushi
Calculation:
Khushi : her Aunt = 1 : 4
Her Aunt : Her brother = 9 : 1
∴ Khushi : Her Aunt : Her brother = 9 : 36 : 4
∴ According to the question,
⇒ 9x – 4x = 5
⇒ 5x = 5
⇒ x = 1
Khushi’s Aunt’s age after 6 years = (36 × 1) + 6
⇒ 42 years
∴ Khushi’s Aunt’s age after 6 years is 42 years.