Xylia paid $12 for 3 muffins and 7 pies. A pie cost thrice as much as a muffin.
- Find the cost of a muffin in cents.
- How much more did she pay for a pie than a muffin?
| |
Muffins |
Pies |
Total |
| Number |
3 |
7 |
|
| Value |
1 u |
3 u |
|
| Total value |
3 u |
21 u |
24 u |
(a)
Cost of 1 muffin = 1 u
Cost of 1 pie = 3 u
Cost of 3 muffins
= 3 x 1 u
= 3 u
Cost of 7 pies
= 7 x 3 u
= 21 u
Total cost of 3 muffins and 7 pies
= 3 u + 21 u
= 24 u
$1 = 100¢
$12 = 12 x 100 = 1200¢
24 u = 1200
1 u = 1200 ÷ 24 = 50
Cost of a bun
= 1 u
= 50¢
(b)
Amount that Xylia paid more for a pie than a muffin
= 3 u - 1 u
= 2 u
= 2 x 50
= 100¢
100¢ = $1
Answer(s): (a) 50¢ (b) $1
