When Mr Fabian is 43 years old, his nephew is 3 years old. In how many years will he be 3 times as old as his nephew?
|
Mr Fabian |
His nephew |
Difference |
Before |
43 |
3 |
40 |
Change |
+ ? |
+ ? |
|
After |
3 u |
1 u |
2 u |
The difference in the age between Mr Fabian and his nephew at first and in the end remains the same.
Difference in the age between Mr Fabian and his nephew
= 3 u - 1 u
= 2 u
2 u = 43 - 3
2 u = 40
1 u = 40 ÷ 2 = 20
Number of years' time so Mr Fabian will be 3 times as old as his nephew
= 20 - 3
= 17
Answer(s): 17