math

A jet flew at an average speed of 480 mph from Point X to Point Y. Because of head winds, the jet averaged only 440 mph on the return trip, and the return trip took 30 minutes longer. How many hours was the flight from Point Y to Point X? how far is it from Point X to Point Y?

How many hours was the flight from Point Y to Point X?

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  1. since distance = speed * time,

    480t = 440(t + 1/2)
    40t = 220
    t = 5.5

    So, it took 5.5 hrs at 480 mph, and 6 hrs at 440 mph.

    I figure you can do the rest now.

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