Adam is 38 years old.
Bryan is 8 years old.
In a few years' time, Adam will be 4 times as old as Bryan.
- In how many years' time will Adam be 4 times as old as Bryan?
- How old will Adam be by that time?
|
Adam |
Bryan |
Difference |
Before |
38 |
8 |
30 |
Change |
+ ? |
+ ? |
|
After |
4 u |
1 u |
3 u |
(a)
For Adam to be 4 times as old as Bryan,
Bryan's age = 1 u
Adam's age = 4 u
Difference in their age
= 4 u - 1 u
= 3 u
Age difference between Adam and Bryan
= 38 - 8
= 30
3 u = 30
1 u = 30 ÷ 3 = 10
Number of years' time when Adam will be 4 times as old as Bryan
= 10 - 8
= 2
(b)
Adam's age in 2 years' time
= 4 u
= 4 x 10
= 40
Answer(s): (a) 2; (b) 40