The ratio of the number of puffs to the number of muffins in a supermarket is 6 : 1. A puff costs $1.10 and a muffin costs $0.40. If all the puffs and muffins are sold, a sum of $280 will be collected. How many puffs are there altogether?
| |
Puffs |
Muffins |
Total |
| Number |
6 u |
1 u |
|
| Value |
$1.10 |
$0.40 |
|
| Total value |
6.6 u |
0.4 u |
$280 |
Amount collected if all the puffs are sold
= 6 u x 1.1
= 6.6 u
Amount collected if all the muffins are sold
= 1 u x 0.4 u
= 0.4 u
Amount collected if all the puffs and muffins are sold
= 6.6 u + 0.4 u
= 7 u
7 u = 280
1 u = 280 ÷ 7 = 40
Total number of puffs
= 6 u
= 6 x 40
= 240
Answer(s): 240
