When Mr Oscar is 32 years old, his child is 8 years old. In how many years will he be 3 times as old as his child?
|
Mr Oscar |
His child |
Difference |
Before |
32 |
8 |
24 |
Change |
+ ? |
+ ? |
|
After |
3 u |
1 u |
2 u |
The difference in the age between Mr Oscar and his child at first and in the end remains the same.
Difference in the age between Mr Oscar and his child
= 3 u - 1 u
= 2 u
2 u = 32 - 8
2 u = 24
1 u = 24 ÷ 2 = 12
Number of years' time so Mr Oscar will be 3 times as old as his child
= 12 - 8
= 4
Answer(s): 4