SOLUTION: Two planes leave at 10 AM from airports that are 1350 kilometers apart and fly towards each other at speeds of 400 km/h and 500 km/h. At what time will they pass each other?

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Question 1157785: Two planes leave at 10 AM from airports that are 1350 kilometers apart and fly towards each other at speeds of 400 km/h and 500 km/h. At what time will they pass each other?
Answer by ikleyn(52787)   (Show Source): You can put this solution on YOUR website!
.

Let " t " be the time under the question.


Then you have this equation

    400t + 500t = 1350,

saying that the total distance is the sum of partial distances.


Simplify and solve for t


    900t = 1350

    t    =  = 1.5 hours.


ANSWER. 1 hour and 30 minutes.

Solved.

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