Peter and Rael were given some allowances each. If Peter spent $24 each day and Rael spent $48 each day, Peter would still have $567 left when Rael spent all his allowance. If Peter spent $48 each day and Rael spent $24 each day, Peter would still have $63 left when Rael spent all his allowance.
- How much allowance did Peter receive?
- How much allowance did Rael receive?
|
Case 1 |
Case 2 |
|
Peter |
Rael |
Peter |
Rael |
Before |
1 u + 567 |
2 u |
2 p + 63 |
1 p |
Change |
- 1 u |
- 2 u |
- 2 p |
- 1 p |
After |
567 |
0 |
63 |
0 |
(a)
Simplify the ratio.
24 : 48 = 1 : 2
The allowance that Rael had at first is the same for Case 1 and Case 2.
1 p = 2 u
2 p = 4 u
The allowance that Peter had at first is the same for Case 1 and Case 2.
4 u + 63 = 1 u + 567
4 u - 1 u = 567 - 63
3 u = 504
1 u = 504 ÷ 3 = 168
Allowance that Peter received
= 1 u + 567
= 168 + 567
= $735
(b)
Allowance that Rael received
= 2 u
= 2 x 168
= $336
Answers: (a) $735; (b) $336