Answer: A cow produced approximately 6 gallons of milk per day.
Step-by-step explanation:
Since we have given that
1 gallon = 8.5 pounds
Quantity of milk per day cow produces = 53 pounds
1 pound = [tex]\dfrac{1}{8.5}\ gallon[/tex]
53 pounds would be
[tex]\dfrac{1}{8.5}\times 53\\\\=6.23\ gallons[/tex]
Hence, a cow produced approximately 6 gallons of milk per day.