The ratio of the number of wafers to the number of puffs in a stall is 6 : 1. A wafer costs $1.70 and a puff costs $0.70. If all the wafers and puffs are sold, a sum of $327 will be collected. How many wafers are there altogether?
| |
Wafers |
Puffs |
Total |
| Number |
6 u |
1 u |
|
| Value |
$1.70 |
$0.70 |
|
| Total value |
10.2 u |
0.7 u |
$327 |
Amount collected if all the wafers are sold
= 6 u x 1.7
= 10.2 u
Amount collected if all the puffs are sold
= 1 u x 0.7 u
= 0.7 u
Amount collected if all the wafers and puffs are sold
= 10.2 u + 0.7 u
= 10.9 u
10.9 u = 327
1 u = 327 ÷ 10.9 = 30
Total number of wafers
= 6 u
= 6 x 30
= 180
Answer(s): 180
