Fill in the blanks.
Bryan is 40 years old and
Adam is 8 years old.
- Difference in their age now = _____
- Difference in their age when Bryan is thrice the age of Adam = _____ u
- In how many years' time will Bryan be thrice the age of Adam?
- How old will Bryan be when he will be thrice the age of Adam?
|
Bryan |
Adam |
Difference |
Before |
40 |
8 |
32 |
Change |
+ ? |
+ ? |
|
After |
3 u |
1 u |
2 u |
(a)
Change X times into units.
Difference in their age
= 40 - 8
= 32
(b)
Difference in the age when Bryan is thrice the age of Adam
= 3 u - 1 u
= 2 u
(c)
2 u = 32
1 u = 32 ÷ 2 = 16
Number of years' time when Bryan will be thrice the age of Adam
= 1 u - 8
= 16 - 8
= 8
(d)
Bryan's age when he will be thrice the age of Adam
= 3 u
= 3 x 16
= 48
Answer(s): (a) 32; (b) 2; (c) 8; (d) 48