A chemical feed pump delivering 75 gallons per day equates to how many milliliters per minute?

• A. 150 ml/min
• B. 197 ml/min
• C. 300 ml/min
• D. 370 ml/min

Answer: (B)

To convert gallons per day to milliliters per minute, one must first understand the relationships between these units of measurement.

1. Gallons to milliliters: One gallon is equivalent to approximately 3,785.41 milliliters. To convert 75 gallons to milliliters, you would multiply:

[

75 , \text{gallons} \times 3,785.41 , \text{ml/gallon} = 283,905.75 , \text{ml}

]

2. Daily to per minute: There are 1,440 minutes in a day (24 hours x 60 minutes). To find out how many milliliters are delivered per minute, divide the total milliliters by the number of minutes in a day:

[

\frac{283,905.75 , \text{ml}}{1,440 , \text{minutes}} \approx 197.43 , \text{ml/min}

]

This calculation shows that the flow rate of 75 gallons per day corresponds to approximately 197 milliliters per minute. Rounding this to the nearest whole number gives you