Howard is 9 years old. His auntie is 28 years older than him. In how many years will Howard's auntie be 3 times as old as Howard?
| |
His auntie |
Howard |
Difference |
| Before |
37 |
9 |
28 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
1 u |
2 u |
The difference in the age between Howard and his auntie at first and in the end remains the same.
Difference in the age between Howard and his auntie
= 3 u - 1 u
= 2 u
2 u = 28
1 u = 28 ÷ 2 = 14
The increase in age of Howard and his auntie remains the same.
Number of years' time so Howard's auntie will be 3 times as old as Howard
= 14 - 9
= 5
Answer(s): 5
