An airplane travels 3100 km at a speed of 790 km/h, and
Chapter 25, Problem 13P(choose chapter or problem)
An airplane travels 3100 km at a speed of 790 km/h, and then encounters a tailwind that boosts its speed to 990 km/h for the next 2800 km. What was the total time for the trip? What was the average speed of the plane for this trip? [Hint: Think carefully before using Eq. 2-11d.]
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