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