A student pilot was required to fly to an airport and the...
A student pilot was required to fly to an airport and then return as part of his flight training. The average speed to the airport was 120 km/h, and the average speed returning was 150 km/h. If the total flight time was 3 hours, calculate the distance between the two airports.
270 km
200 km
360 km
450 km
Correct answer is B
Speed = DistanceTime
⇒ Time = DistanceTime
Let D = distance between the two airports
∴ Time taken to get to the airport = D120 and Time taken to return =D150
Since total time of flight= 3hours,
⇒ D120+D150 = 3
⇒ 15D+12D1800 = 3
⇒ 27D1800 = 3
⇒ 3D200=31
⇒ 3D = 200 x 3
∴ D =200×33= 200km
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