SOLUTION: Two jets leave Chicago at the same time, one flying due west at 750km/hr, the other flying due east at 850km/hr. After how long will the planes be 4000 km apart? ~Thanks, David

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Question 401155: Two jets leave Chicago at the same time, one flying due west at 750km/hr, the other flying due east at 850km/hr. After how long will the planes be 4000 km apart?
~Thanks, David
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

Let x represent time traveled by each of the planes

Question states***

 750kmph*x + 850kmph*x = 4000km

       x = 4000km/1600kmph

       x = 2.5hr, time traveled when 4000km apart



CHECKING our Answer***

  750*2.5 + 850*2.5 = 4000km