Julia travels in an air plane a distance of 1980 miles. for one-third of distance, the airplane flies at a speed of 620 mph, and for the rest of the distance, it flies at a speed of 540 mph, How long does the trip take ?
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Julia travels in an air plane a distance of 1980 miles. for one-third of distance, the airplane flies at a speed of 620 mph, and for the rest of the distance, it flies at a speed of 540 mph, How long does the trip take ?
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Answer:
1st half - 400km at 760km/h
760/400= 1.9
60/1.9= 31.57mins to go 400km
2nd half - 400km at 900km/h
900/400= 2.25
60/2.25= 26.6....mins to go the other 400km
31.57+ 26.67 = 58.24 mins in total