What is the approximate flight time available with 344 lb of usable fuel at the given altitude and temperature?

To determine the approximate flight time available with 344 lb of usable fuel, one must first establish the fuel consumption rate of the aircraft at the specified altitude and temperature conditions. The flight time can then be calculated using the formula:

Flight Time = Usable Fuel (in lbs) / Fuel Consumption Rate (in lbs per hour).

If the value for fuel consumption is provided or can be estimated based on typical performance data for that specific aircraft type at the given conditions, one can perform the calculation.

Selecting C, which states 5 hours and 59 minutes, suggests that the fuel consumption rate allows for nearly 6 hours of flight using the available fuel. This indicates a relatively efficient aircraft operation at the altitude and temperature provided, where the consumption rate aligns with the usable fuel amount.

This answer assumes that an appropriate understanding of the aircraft’s performance metrics has been factored in to yield an accurate flight time estimate, which is crucial for planning and operational efficiency.