The age of Brandon is
35 of Warren's age. 20 years later, the ratio of Brandon's age to Warren's age is 4 : 5. How old is Warren at first?
|
Brandon |
Warren |
Difference |
Before |
3 u |
5 u |
2 u |
Change |
+ 20 |
+ 20 |
|
After |
4x2 = 8 u |
5x2 = 10 u |
1x2 = 2 u |
The difference in the age between Brandon and Warren at first and in the end remains unchanged. Make the difference in the age between Brandon and Warren the same. LCM of 2 and 1 is 2.
Increase in Brandon's age
= 8 u - 3 u
= 5 u
5 u = 20
1 u = 20 ÷ 5 = 4
Warren's age at first
= 5 u
= 5 x 4
= 20
Answer(s): 20