With a usable fuel load of 425 pounds at cruise altitude, what is the aircraft's endurance with the given conditions?

To determine the aircraft's endurance with a usable fuel load of 425 pounds, it is essential to understand the relationship between fuel consumption and endurance. Endurance is calculated using the formula:

Endurance (hours) = Usable Fuel (pounds) / Fuel Burn Rate (pounds per hour).

To proceed, one must know the fuel burn rate of the aircraft during cruise. For instance, if the aircraft burns fuel at the rate of 155 pounds per hour, the calculation would be:

Endurance = 425 pounds / 155 pounds per hour = 2.74 hours.

To convert hours into hours and minutes, take the decimal part (0.74) and multiply it by 60. This results in approximately 44 minutes.

So, the endurance converts to 2 hours and 44 minutes.

This computation aligns with the choice indicating an endurance of 2 hours and 44 minutes, confirming it as the correct answer based on the assumption of a specific fuel burn rate. To fully validate this answer, one can substitute the appropriate burn rate for the aircraft in question, but it provides a clear understanding of how to approach calculating endurance given usable fuel and burn rate.