Oliver is 4 years old now. His brother is 30 years older than him. How old will Oliver be when his age is
58 of his brother's age?
| |
Oliver |
His brother |
Difference |
| Before |
|
|
30 |
| Change |
+ ? |
+ ? |
|
| After |
5 u |
8 u |
3 u |
The difference in the age between Oliver and his brother at first and in the end remains unchanged.
Number of years that his brother is older than Oliver
= 8 u - 5 u
= 3 u
3 u = 30
1 u = 30 ÷ 3 = 10
Oliver's age when his age is
58 of his brother's age
= 5 u
= 5 x 10
= 50
Answer(s): 50
