Question

Julia travels in an airplane a distance of 1980 miles. For one third of the distance the airplane flies at a speed of 620 miles per hour, and for the rest of the distance, it flies at a speed of 540 miles per hour. How long does the trip take?​

Answer 1

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