Adam is 30 years old. The total age of Adam and Bryan is 84 years. How many years ago was the ratio of Adam's age to Bryan's age 1 : 5?
| |
Adam |
Bryan |
Total |
Difference |
| Before |
1 u |
5 u |
|
4 u |
| Change |
+ ? |
+ ? |
|
|
| After |
30 |
54 |
84 |
24 |
Bryan's age
= 84 - 30
= 54
Difference in the age between Adam and Bryan
= 54 - 30
= 24
To find the number of years ago for the ratio of Adam's age to Bryan's age to be 1 : 5.
Adam's age = 1 u
Bryan's age = 5 u
Difference in the age
= 5 u - 1 u
= 4 u
4 u = 24
1 u = 24 ÷ 4 = 6
Adam's age then = 1 u = 6
Adam's age now = 30
Number of years ago
= 30 - 6
= 24
Answer(s): 24
