Question

The present ages of three persons in proportions 3: 6: 4 Nine years ago, the sum of their ages was 64, then find their present ages (in years)?
1. 21, 42, 28
2. 18, 35, 38
3. 24, 45, 13
4. 13, 25, 27
5. None of these

Answer 1

Correct Answer - Option 1 : 21, 42, 28

Given:

The present ages of three persons in proportions 3: 6: 4 Nine years ago, the sum of their ages was 64

Calculation

Let their present ages = 3x, 6x, and 4x years

Then,

(3x - 9) + (6x - 9) + (4x - 9) = 64

13 x = 64 + 27

13x = 91

X = 7

Hence, their ages = 21, 42, and 28.