Ryan is 3 years old. His uncle is 16 years older than him. In how many years will Ryan's uncle be 3 times as old as Ryan?
| |
His uncle |
Ryan |
Difference |
| Before |
19 |
3 |
16 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
1 u |
2 u |
The difference in the age between Ryan and his uncle at first and in the end remains the same.
Difference in the age between Ryan and his uncle
= 3 u - 1 u
= 2 u
2 u = 16
1 u = 16 ÷ 2 = 8
The increase in age of Ryan and his uncle remains the same.
Number of years' time so Ryan's uncle will be 3 times as old as Ryan
= 8 - 3
= 5
Answer(s): 5
