Marys airplane trip took 5.8 hours for one-half of that time, the airplane flew at a constant speed of 640 miles per hour and for the rest of the time, it flew at a speed of 580 mph. what distance did mary travel?

Question

Physics

Darien Sexton

16 September, 03:52

Marys airplane trip took 5.8 hours for one-half of that time, the airplane flew at a constant speed of 640 miles per hour and for the rest of the time, it flew at a speed of 580 mph. what distance did mary travel?

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Answers (1)

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Graham Huff · Answer 1

Distance is speed x time. Half of the trip is 5.8/2 = 2.9hrs.

640 x 2.9 = 1856mi

580 x 2.9 = 1682mi

1856mi+1682mi=3538mi.

You could also calculate her average speed. This is easy since it was divided in two equal time slices. Average Speed = (640+580) / 2 = 610mi/hr

Now 610mi/hr x 5.8hrs = 3538mi