Justin is 5 years old now. His brother is 36 years older than him. How old will Justin be when his age is
59 of his brother's age?
|
Justin |
His brother |
Difference |
Before |
|
|
36 |
Change |
+ ? |
+ ? |
|
After |
5 u |
9 u |
4 u |
The difference in the age between Justin and his brother at first and in the end remains unchanged.
Number of years that his brother is older than Justin
= 9 u - 5 u
= 4 u
4 u = 36
1 u = 36 ÷ 4 = 9
Justin's age when his age is
59 of his brother's age
= 5 u
= 5 x 9
= 45
Answer(s): 45