When Mr Oliver is 30 years old, his nephew is 2 years old. In how many years will he be 3 times as old as his nephew?
| |
Mr Oliver |
His nephew |
Difference |
| Before |
30 |
2 |
28 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
1 u |
2 u |
The difference in the age between Mr Oliver and his nephew at first and in the end remains the same.
Difference in the age between Mr Oliver and his nephew
= 3 u - 1 u
= 2 u
2 u = 30 - 2
2 u = 28
1 u = 28 ÷ 2 = 14
Number of years' time so Mr Oliver will be 3 times as old as his nephew
= 14 - 2
= 12
Answer(s): 12
