Multiple choice

A pilot flies from New York to Chicago at an average speed of 450 miles per hour. On the return flight, the pilot encounters a tailwind, increasing the speed to 510 miles per hour. Assume the distance between the two cities is 765 miles. What is the total flight duration for the round trip?

  1. 2 hours and 54 minutes

  2. 3 hours and 12 minutes

  3. 4 hours and 20 minutes

  4. 4 hours and 48 minutes

  5. 5 hours and 36 minutes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Time = Distance / Speed. Time 1 = 765 / 450 = 1.7 hours. Time 2 = 765 / 510 = 1.5 hours. Total time = 1.7 + 1.5 = 3.2 hours. 0.2 hours = 12 minutes. Total = 3 hours and 12 minutes.

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