Rael is 5 years old. His uncle is 45 years older than him. In how many years will Rael's uncle be 6 times as old as Rael?
| |
His uncle |
Rael |
Difference |
| Before |
50 |
5 |
45 |
| Change |
+ ? |
+ ? |
|
| After |
6 u |
1 u |
5 u |
The difference in the age between Rael and his uncle at first and in the end remains the same.
Difference in the age between Rael and his uncle
= 6 u - 1 u
= 5 u
5 u = 45
1 u = 45 ÷ 5 = 9
The increase in age of Rael and his uncle remains the same.
Number of years' time so Rael's uncle will be 6 times as old as Rael
= 9 - 5
= 4
Answer(s): 4
