To find out how many gallons per hour the pump produces, you can divide the total gallons produced by the number of hours.
The pump produces 280 gallons in 24 hours:
\[ \text{Gallons per hour} = \frac{280 \text{ gallons}}{24 \text{ hours}} \approx 11.67 \text{ gallons per hour} \]
Rounding this to two decimal places gives you approximately 11.67 gallons per hour.
Looking at the options provided, the closest answer is:
B) 11.66 gallons.