Mrs Yeo is 34 years old and her son is 8 years old now. In how many years' time will Mrs Yeo be thrice as old as her son?
| |
Mrs Yeo |
Her son |
Difference |
| Before |
34 |
8 |
26 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
1 u |
2 u |
The difference in the age between Mrs Yeo and her son remains unchanged.
Difference in their age at first
= 34 - 8
= 26
Difference in their age in the end
= 3 u - 1 u
= 2 u
2 u = 26
1 u = 26 ÷ 2 = 13
Number of years time that Mrs Yeo will be thrice as old as her son
= 1 u - 8
= 13 - 8
= 5
Answer(s): 5
