Ken is 5 years old now. His brother is 28 years older than him. How old will Ken be when his age is
35 of his brother's age?
|
Ken |
His brother |
Difference |
Before |
|
|
28 |
Change |
+ ? |
+ ? |
|
After |
3 u |
5 u |
2 u |
The difference in the age between Ken and his brother at first and in the end remains unchanged.
Number of years that his brother is older than Ken
= 5 u - 3 u
= 2 u
2 u = 28
1 u = 28 ÷ 2 = 14
Ken's age when his age is
35 of his brother's age
= 3 u
= 3 x 14
= 42
Answer(s): 42