Correct Answer - Option 1 : 78 years
Given:
Ratio of ages NIlam and Anu is 4 ∶ 9
Concept Used:
Ratio concept is used.
Calculation:
Let the present age of Nilam and Anu be 4x and 9x.
Difference = 9x – 4x = 5x
According to question,
5x = 30
⇒ x = 6
So, Sum of their ages = 4x + 9x = 13x = 13 × 6 = 78 years
∴ Sum of their ages is 78 years old.