Adam is 24 years old. The total age of Adam and Bryan is 72 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 |
24 |
48 |
72 |
24 |
Bryan's age
= 72 - 24
= 48
Difference in the age between Adam and Bryan
= 48 - 24
= 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 = 24
Number of years ago
= 24 - 6
= 18
Answer(s): 18