Bryan is 24 years old. The total age of Bryan and Adam is 66 years. How many years ago was the ratio of Bryan's age to Adam's age 2 : 5?
|
Bryan |
Adam |
Total |
Difference |
Before |
2 u |
5 u |
|
3 u |
Change |
+ ? |
+ ? |
|
|
After |
24 |
42 |
66 |
18 |
Adam's age
= 66 - 24
= 42
Difference in the age between Bryan and Adam
= 42 - 24
= 18
To find the number of years ago for the ratio of Bryan's age to Adam's age to be 2 : 5.
Bryan's age = 2 u
Adam's age = 5 u
Difference in the age
= 5 u - 2 u
= 3 u
3 u = 18
1 u = 18 ÷ 3 = 6
Bryan's age then = 2 u = 12
Bryan's age now = 24
Number of years ago
= 24 - 12
= 12
Answer(s): 12