Adam is 25 years old. The total age of Adam and Bryan is 68 years. How many years ago was the ratio of Adam's age to Bryan's age 1 : 7?
| |
Adam |
Bryan |
Total |
Difference |
| Before |
1 u |
7 u |
|
6 u |
| Change |
+ ? |
+ ? |
|
|
| After |
25 |
43 |
68 |
18 |
Bryan's age
= 68 - 25
= 43
Difference in the age between Adam and Bryan
= 43 - 25
= 18
To find the number of years ago for the ratio of Adam's age to Bryan's age to be 1 : 7.
Adam's age = 1 u
Bryan's age = 7 u
Difference in the age
= 7 u - 1 u
= 6 u
6 u = 18
1 u = 18 ÷ 6 = 3
Adam's age then = 1 u = 3
Adam's age now = 25
Number of years ago
= 25 - 3
= 22
Answer(s): 22
