SOLUTION: Two planes leaves at the same time. One flies west at 300 kilometers per hour. Th other flies at 450 kilometers per hour. In how many hours will they be 2 250 kilometers apart?

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Question 938370: Two planes leaves at the same time. One flies west at 300 kilometers per hour. Th other flies at 450 kilometers per hour. In how many hours will they be 2 250 kilometers apart?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Assuming 'other' flies East
UNITS a HUGE Hint for Set Up
.......
(300mi/hr)t + (450mi/hr)t = 2250mi
t = 2250mi/(750mi/hr) = 3hr