A jet plane travels 2 times the speed of a commercial airplane. The distance between Vancouver and Regina is 1730 km.

Question

. A jet plane travels 2 times the speed of a commercial airplane. The distance between Vancouver and Regina is 1730 km. If the flight from Vancouver to Regina on a commercial airplane takes 140 minutes longer than a jet plane, what is the time of a commercial plane ride of this route?

Answer 1

Let C = commercial speed, J= jet speed, J=2C

Let T = jet time, 140+T = commercial time

distance = rate of speed times time

JT = (140+T)C

2CT = 140C + CT

CT =140C

T = 140

140+T = 280 = time for the commercial plane = 280 minutes between Vancouver to Regina = 280/60 = 28/6 = 4 2/3 hours = 4 hours and 40 minutes