Zara wanted to buy some muffins and croissants. The cost of a muffin was
18 the cost of a croissant. A set of 4 muffins and 3 croissants cost $8.40. What was the total amount Zara had to pay for 3 muffins and 8 croissants?
| |
Muffins |
Croissants |
Total |
| Number |
4 |
3 |
|
| Value |
1 u |
8 u |
|
| Total value |
4 u |
24 u |
28 u |
Total cost of muffins and croissants
= 4 u + 24 u
= 28 u
28 u = 8.4
1 u = 8.40 ÷ 28 = 0.3
Cost of 3 muffins and 8 croissants
= 3 x 1 u + 8 x 8 u
= 3 u + 64 u
= 67 u
= 67 x 0.3
= $20.10
Answer(s): $20.10
