When Mr Zeph is 34 years old, his child is 4 years old. In how many years will he be 6 times as old as his child?
|
Mr Zeph |
His child |
Difference |
Before |
34 |
4 |
30 |
Change |
+ ? |
+ ? |
|
After |
6 u |
1 u |
5 u |
The difference in the age between Mr Zeph and his child at first and in the end remains the same.
Difference in the age between Mr Zeph and his child
= 6 u - 1 u
= 5 u
5 u = 34 - 4
5 u = 30
1 u = 30 ÷ 5 = 6
Number of years' time so Mr Zeph will be 6 times as old as his child
= 6 - 4
= 2
Answer(s): 2