SOLUTION: a small plane leaves the airport at the same time a train leaves the same location. the plane flies 120 mph faster than the train. two hours after their departure the train and pla

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Question 675643: a small plane leaves the airport at the same time a train leaves the same location. the plane flies 120 mph faster than the train. two hours after their departure the train and plane are 420 miles apart. find the speed of each and show the equation.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
a small plane leaves the airport at the same time a train leaves the same location. the plane flies 120 mph faster than the train. two hours after their departure the train and plane are 420 miles apart. find the speed of each and show the equation.
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Train DATA:
rate = x mph ; time = 2 hrs ; distance = 2x miles
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Plane DATA:
rate = x+120 mph ; time = 2 hrs ; distance 2x+240 miles
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Equation:
distance + distance = 420 miles
2x + 2x+240 = 420
4x = 180
x = 45 mph (train rate)
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x+120 = 165 mph (plane rate)
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cheers,
Stan H.
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