The total cost of the portable air-conditioner, the sandwich maker and the kettle is $600. The kettle costs thrice as much as the sandwich maker. The portable air-conditioner costs twice as much as the total price of the kettle and sandwich maker. How much less does the kettle cost than the portable air-conditioner?
| Kettle |
Sandwich Maker |
Portable Air-conditioner |
| 3 u |
1 u |
|
| 4 u |
8 u |
| 3 u |
1 u |
8 u |
Cost of the sandwich maker = 1 u
Cost of the kettle = 3 u
Total cost of the sandwich maker and the kettle
= 1 u + 3 u
= 4 u
Cost of the portable air-conditioner
= 2 x 4 u
= 8 u
Total cost of the kettle, the sandwich maker and portable air-conditioner
= 8 u + 1 u + 3 u
= 12 u
12 u = 600
1 u = 600 ÷ 12 = 50
Amount that the kettle cost less than the portable air-conditioner
= 8 u - 3 u
= 5 u
= 5 x 50
= $250
Answer(s): $250
