The ratio of the number of puffs to the number of croissants in a stall is 6 : 1. A puff costs $1.10 and a croissant costs $0.30. If all the puffs and croissants are sold, a sum of $69 will be collected. How many puffs are there altogether?
| |
Puffs |
Croissants |
Total |
| Number |
6 u |
1 u |
|
| Value |
$1.10 |
$0.30 |
|
| Total value |
6.6 u |
0.3 u |
$69 |
Amount collected if all the puffs are sold
= 6 u x 1.1
= 6.6 u
Amount collected if all the croissants are sold
= 1 u x 0.3 u
= 0.3 u
Amount collected if all the puffs and croissants are sold
= 6.6 u + 0.3 u
= 6.9 u
6.9 u = 69
1 u = 69 ÷ 6.9 = 10
Total number of puffs
= 6 u
= 6 x 10
= 60
Answer(s): 60
