Adam is 29 years old. The total age of Adam and Bryan is 82 years. How many years ago was the ratio of Adam's age to Bryan's age 1 : 4?
| |
Adam |
Bryan |
Total |
Difference |
| Before |
1 u |
4 u |
|
3 u |
| Change |
+ ? |
+ ? |
|
|
| After |
29 |
53 |
82 |
24 |
Bryan's age
= 82 - 29
= 53
Difference in the age between Adam and Bryan
= 53 - 29
= 24
To find the number of years ago for the ratio of Adam's age to Bryan's age to be 1 : 4.
Adam's age = 1 u
Bryan's age = 4 u
Difference in the age
= 4 u - 1 u
= 3 u
3 u = 24
1 u = 24 ÷ 3 = 8
Adam's age then = 1 u = 8
Adam's age now = 29
Number of years ago
= 29 - 8
= 21
Answer(s): 21
