When Mr Valen is 37 years old, his child is 4 years old. In how many years will he be 4 times as old as his child?
| |
Mr Valen |
His child |
Difference |
| Before |
37 |
4 |
33 |
| Change |
+ ? |
+ ? |
|
| After |
4 u |
1 u |
3 u |
The difference in the age between Mr Valen and his child at first and in the end remains the same.
Difference in the age between Mr Valen and his child
= 4 u - 1 u
= 3 u
3 u = 37 - 4
3 u = 33
1 u = 33 ÷ 3 = 11
Number of years' time so Mr Valen will be 4 times as old as his child
= 11 - 4
= 7
Answer(s): 7
