Kimberly paid $12 for 6 muffins and 3 cakes. A cake cost thrice as much as a muffin.
- Find the cost of a muffin in cents.
- How much more did she pay for a cake than a muffin?
| |
Muffins |
Cakes |
Total |
| Number |
6 |
3 |
|
| Value |
1 u |
3 u |
|
| Total value |
6 u |
9 u |
15 u |
(a)
Cost of 1 muffin = 1 u
Cost of 1 cake = 3 u
Cost of 6 muffins
= 6 x 1 u
= 6 u
Cost of 3 cakes
= 3 x 3 u
= 9 u
Total cost of 6 muffins and 3 cakes
= 6 u + 9 u
= 15 u
$1 = 100¢
$12 = 12 x 100 = 1200¢
15 u = 1200
1 u = 1200 ÷ 15 = 80
Cost of a bun
= 1 u
= 80¢
(b)
Amount that Kimberly paid more for a cake than a muffin
= 6 u - 1 u
= 5 u
= 5 x 80
= 400¢
400¢ = $4
Answer(s): (a) 80¢ (b) $4
