SOLUTION: Two trucks leave Chicago traveling in opposite directions. One truck traveled at a rate of 70km/hr, the other at 80km/hr. After how many hours were the trucks 900 km apart?

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Question 251782: Two trucks leave Chicago traveling in opposite directions. One truck traveled at a rate of 70km/hr, the other at 80km/hr. After how many hours were the trucks 900 km apart?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Two trucks leave Chicago traveling in opposite directions. One truck traveled at a rate of 70km/hr, the other at 80km/hr. After how many hours were the trucks 900 km apart?
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Their separation speed was 70+80 = 150 mph.
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Equation:
time = distance /rate
time = 900 mi/150 mph = 6 hrs.
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Cheers,
Stan H.