Warren is 2 years old. His uncle is 39 years older than him. In how many years will Warren's uncle be 4 times as old as Warren?
| |
His uncle |
Warren |
Difference |
| Before |
41 |
2 |
39 |
| Change |
+ ? |
+ ? |
|
| After |
4 u |
1 u |
3 u |
The difference in the age between Warren and his uncle at first and in the end remains the same.
Difference in the age between Warren and his uncle
= 4 u - 1 u
= 3 u
3 u = 39
1 u = 39 ÷ 3 = 13
The increase in age of Warren and his uncle remains the same.
Number of years' time so Warren's uncle will be 4 times as old as Warren
= 13 - 2
= 11
Answer(s): 11
