Certified Flight Instructor - Flight Instructor Airplane Practice Exam

On a cross-country flight, if point X is crossed at 1015, what is the expected indicated airspeed to reach point Y at 1025 over a distance of 27 NM?

1. 162 knots

2. 140 knots

3. 128 knots

4. 120 knots

The correct answer is: 128 knots

To determine the indicated airspeed needed to travel from point X to point Y, we first calculate the total flight time available and the distance to be flown. Point X is crossed at 1015, and you need to reach point Y by 1025, which provides a total flight time of 10 minutes. Next, we need to convert that time into hours since airspeed is typically expressed in knots (nautical miles per hour). There are 60 minutes in an hour, so 10 minutes is equal to 10/60 or 1/6 hours. Now, we can find the required airspeed using the formula: Airspeed = Distance / Time In this scenario, the distance to travel is 27 nautical miles, and the time available is 1/6 of an hour: Airspeed = 27 NM / (1/6 hours) = 27 NM * (6/1) = 162 knots. Thus, the calculation leads to the conclusion that the indicated airspeed needed to reach point Y in the specified time over the distance of 27 nautical miles is 162 knots. The correct answer is therefore based on this calculated airspeed and aligns with the requirements of the question. The