Mrs Neo is 48 years old and her child is 14 years old now. In how many years' time will Mrs Neo be thrice as old as her child?
| |
Mrs Neo |
Her child |
Difference |
| Before |
48 |
14 |
34 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
1 u |
2 u |
The difference in the age between Mrs Neo and her child remains unchanged.
Difference in their age at first
= 48 - 14
= 34
Difference in their age in the end
= 3 u - 1 u
= 2 u
2 u = 34
1 u = 34 ÷ 2 = 17
Number of years time that Mrs Neo will be thrice as old as her child
= 1 u - 14
= 17 - 14
= 3
Answer(s): 3
