If an airplane requires 40 gallons of fuel for a journey of 500 NM and is traveling at a groundspeed of 100 knots, what is the fuel burn rate?

To determine the fuel burn rate for the journey, we first need to calculate the total time spent in flight based on the given groundspeed and distance. The airplane is traveling 500 nautical miles at a groundspeed of 100 knots.

The formula to calculate the time (in hours) taken for the flight is:

[

\text{Time} = \frac{\text{Distance}}{\text{Groundspeed}}

]

Substituting the given values:

[

\text{Time} = \frac{500 \text{ NM}}{100 \text{ knots}} = 5 \text{ hours}

]

Next, knowing that the airplane requires 40 gallons of fuel for this journey, we can calculate the fuel burn rate by dividing the total fuel consumed by the total time of flight:

[

\text{Fuel Burn Rate} = \frac{\text{Total Fuel}}{\text{Time}}

]

Applying the values we have:

[

\text{Fuel Burn Rate} = \frac{40 \text{ gallons}}{5 \text{ hours}} = 8 \text{ gallons per hour}

]

Thus, the fuel burn rate is 8 gallons per hour. This indicates that during