If a chemical pump is feeding 30 ml/min and operates 5 minutes out of every hour, how long will a 30-gallon drum last?

To determine how long a 30-gallon drum will last when a chemical pump is feeding at a rate of 30 ml/min for 5 minutes every hour, we first need to calculate the total amount of chemical being used per hour.

The pump feeds at a rate of 30 ml/min. If it operates for 5 minutes, the total amount fed in one operation is:

30 ml/min × 5 min = 150 ml per hour.

Next, to find out how many hours the 30-gallon drum will last, we need to convert gallons to milliliters. Since 1 gallon is approximately 3,785 ml, a 30-gallon drum will hold:

30 gallons × 3,785 ml/gallon = 113,550 ml.

Now, by dividing the total volume of the drum by the amount fed per hour, we can find the total hours of operation:

113,550 ml ÷ 150 ml/hour = 757 hours.

To find out how many days this corresponds to, we convert hours into days:

757 hours ÷ 24 hours/day ≈ 31.5 days.

Since we're looking for the closest match from the provided options and recognizing that actual operation times can slightly vary based