PSLE A fruit stall sold apples at 80¢ and grapefruits at 50¢ each. Vanessa bought some apples and Hilda bought some grapefruits from the stall. Vanessa spent $0.10 more than Hilda, but had 4 fruits fewer than Hilda.
- How many apples did Vanessa buy?
- How much did Hilda spend on the grapefruits?
|
Apples |
Grapefruits |
Number |
1 u |
1 u + 4 |
Value |
0.8 |
0.5 |
Total value |
0.8 u |
0.5 u + 2 |
(a)
Number of apples that Vanessa bought = 1 u
Number of grapefruits that Hilda bought = 1 u + 4
Amount that Vanessa paid = 0.8 x 1 u = 0.8 u
Amount that Hilda paid = 0.5(1 u + 4) = 0.5 u + 2
If Hilda spent another $0.10, both Hilda and Vanessa would spend the same amount.
0.8 u = 0.5 u + 2 + 0.1
0.8 u - 0.5 u = 2 + 0.1
0.3 u = 2.1
1 u = 2.1 ÷ 0.3 = 7
Number of apples that Vanessa bought
= 1 u
= 7
(b)
Amount that Hilda spent on the grapefruits
= 0.5 u + 2
= 0.5 x 7 + 2
= 3.5 + 2
= $5.50
Answer(s): (a) 7; (b) $5.50