3 refrigerators and 4 laptops cost a total of $2490. Each refrigerator costs twice as much as each laptop.
- What is the cost of each refrigerator?
- What is the total cost of 1 refrigerator and 1 laptop?
(a)
Cost of 1 laptop = 1 u
Cost of 1 refrigerator = 2 x 1 u = 2 u
Cost of 4 laptops = 4 x 1 u = 4 u
Cost of 3 refrigerators = 3 x 2 u = 6 u
Total cost of 3 refrigerators and 4 laptops
= 6 u + 4 u
= 10 u
10 u = 2490
1 u = 2490 ÷ 10 = 249
Cost of each refrigerator
= 2 u
= 2 x 249
= $498
(b)
Total cost of 1 refrigerator and 1 laptop
= 2 u + 1 u
= 3 u
= 3 x 249
= $747
Answer(s): (a) $498; (b) $747
