When Mr Bryan is 40 years old, his daughter is 5 years old. In how many years will he be 6 times as old as his daughter?
| |
Mr Bryan |
His daughter |
Difference |
| Before |
40 |
5 |
35 |
| Change |
+ ? |
+ ? |
|
| After |
6 u |
1 u |
5 u |
The difference in the age between Mr Bryan and his daughter at first and in the end remains the same.
Difference in the age between Mr Bryan and his daughter
= 6 u - 1 u
= 5 u
5 u = 40 - 5
5 u = 35
1 u = 35 ÷ 5 = 7
Number of years' time so Mr Bryan will be 6 times as old as his daughter
= 7 - 5
= 2
Answer(s): 2
