When Mr George is 30 years old, his daughter is 6 years old. In how many years will he be 3 times as old as his daughter?
| |
Mr George |
His daughter |
Difference |
| Before |
30 |
6 |
24 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
1 u |
2 u |
The difference in the age between Mr George and his daughter at first and in the end remains the same.
Difference in the age between Mr George and his daughter
= 3 u - 1 u
= 2 u
2 u = 30 - 6
2 u = 24
1 u = 24 ÷ 2 = 12
Number of years' time so Mr George will be 3 times as old as his daughter
= 12 - 6
= 6
Answer(s): 6
