A 2.0 hour flight requires 1.5 hours of actual flying time and 0.5 hour reserve. If burn rate is 6 GPH, how many gallons total are needed?

A 2.0 hour flight requires 1.5 hours of actual flying time and 0.5 hour reserve. If burn rate is 6 GPH, how many gallons total are needed?

• A. 12 gallons
• B. 6 gallons
• C. 18 gallons
• D. 24 gallons

Answer: (A)

Fuel needed equals burn rate times total time. The total time includes both actual flying time and reserve time. Here, actual flying time is 1.5 hours and reserve is 0.5 hours, so total time is 2.0 hours. At 6 gallons per hour, the total fuel is 6 × 2.0 = 12 gallons. Therefore, 12 gallons are required.

Fuel needed equals burn rate times total time. The total time includes both actual flying time and reserve time. Here, actual flying time is 1.5 hours and reserve is 0.5 hours, so total time is 2.0 hours. At 6 gallons per hour, the total fuel is 6 × 2.0 = 12 gallons. Therefore, 12 gallons are required.