When Mr Justin is 29 years old, his nephew is 3 years old. In how many years will he be 3 times as old as his nephew?
| |
Mr Justin |
His nephew |
Difference |
| Before |
29 |
3 |
26 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
1 u |
2 u |
The difference in the age between Mr Justin and his nephew at first and in the end remains the same.
Difference in the age between Mr Justin and his nephew
= 3 u - 1 u
= 2 u
2 u = 29 - 3
2 u = 26
1 u = 26 ÷ 2 = 13
Number of years' time so Mr Justin will be 3 times as old as his nephew
= 13 - 3
= 10
Answer(s): 10
