Wesley is 4 years old. His father is 36 years older than him. In how many years will Wesley's father be 4 times as old as Wesley?
| |
His father |
Wesley |
Difference |
| Before |
40 |
4 |
36 |
| Change |
+ ? |
+ ? |
|
| After |
4 u |
1 u |
3 u |
The difference in the age between Wesley and his father at first and in the end remains the same.
Difference in the age between Wesley and his father
= 4 u - 1 u
= 3 u
3 u = 36
1 u = 36 ÷ 3 = 12
The increase in age of Wesley and his father remains the same.
Number of years' time so Wesley's father will be 4 times as old as Wesley
= 12 - 4
= 8
Answer(s): 8
