Dylan is 5 years old. His uncle is 42 years older than him. In how many years will Dylan's uncle be 4 times as old as Dylan?
| |
His uncle |
Dylan |
Difference |
| Before |
47 |
5 |
42 |
| Change |
+ ? |
+ ? |
|
| After |
4 u |
1 u |
3 u |
The difference in the age between Dylan and his uncle at first and in the end remains the same.
Difference in the age between Dylan and his uncle
= 4 u - 1 u
= 3 u
3 u = 42
1 u = 42 ÷ 3 = 14
The increase in age of Dylan and his uncle remains the same.
Number of years' time so Dylan's uncle will be 4 times as old as Dylan
= 14 - 5
= 9
Answer(s): 9
