The ratio of the number of puffs to the number of cookies in a supermarket is 5 : 1. A puff costs $1.60 and a cookie costs $0.70. If all the puffs and cookies are sold, a sum of $87 will be collected. How many puffs are there altogether?
|
Puffs |
Cookies |
Total |
Number |
5 u |
1 u |
|
Value |
$1.60 |
$0.70 |
|
Total value |
8 u |
0.7 u |
$87 |
Amount collected if all the puffs are sold
= 5 u x 1.6
= 8 u
Amount collected if all the cookies are sold
= 1 u x 0.7 u
= 0.7 u
Amount collected if all the puffs and cookies are sold
= 8 u + 0.7 u
= 8.7 u
8.7 u = 87
1 u = 87 ÷ 8.7 = 10
Total number of puffs
= 5 u
= 5 x 10
= 50
Answer(s): 50