Bryan is 29 years old. The total age of Bryan and Adam is 78 years. How many years ago was the ratio of Bryan's age to Adam's age 1 : 5?
|
Bryan |
Adam |
Total |
Difference |
Before |
1 u |
5 u |
|
4 u |
Change |
+ ? |
+ ? |
|
|
After |
29 |
49 |
78 |
20 |
Adam's age
= 78 - 29
= 49
Difference in the age between Bryan and Adam
= 49 - 29
= 20
To find the number of years ago for the ratio of Bryan's age to Adam's age to be 1 : 5.
Bryan's age = 1 u
Adam's age = 5 u
Difference in the age
= 5 u - 1 u
= 4 u
4 u = 20
1 u = 20 ÷ 4 = 5
Bryan's age then = 1 u = 5
Bryan's age now = 29
Number of years ago
= 29 - 5
= 24
Answer(s): 24