The total cost of the laptop, the slow cooker and the lamp is $1200. The lamp costs four times as much as the slow cooker. The laptop costs twice as much as the total price of the lamp and slow cooker. How much more does the lamp cost than the laptop?
| Lamp |
Slow Cooker |
Laptop |
| 4 u |
1 u |
|
| 5 u |
10 u |
| 4 u |
1 u |
10 u |
Cost of the slow cooker = 1 u
Cost of the lamp = 4 u
Total cost of the slow cooker and the lamp
= 1 u + 4 u
= 5 u
Cost of the laptop
= 2 x 5 u
= 10 u
Total cost of the lamp, the slow cooker and laptop
= 10 u + 1 u + 4 u
= 15 u
15 u = 1200
1 u = 1200 ÷ 15 = 80
Amount that the laptop cost more than the lamp
= 10 u - 4 u
= 6 u
= 6 x 80
= $480
Answer(s): $480
