SOLUTION: a train leaves Little Rock, AR Kansas, and travels north at 70 kilometres per hour. Another train leaves at the same time and travel south at 80 kilometres per hour. How long will

Question 917495: a train leaves Little Rock, AR Kansas, and travels north at 70 kilometres per hour. Another train leaves at the same time and travel south at 80 kilometres per hour. How long will it take before they are 300 kilometers apart?
Found 3 solutions by livishea, MathTherapy, richwmiller:
Answer by livishea(5)   (Show Source): You can put this solution on YOUR website!
The answer is 210 what you do is take 70 and 80 and add them together and you get 150 then you subtract 60 and you get 90 then you subtract 90 from 300 and you get 210 and that's your answer.
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

a train leaves Little Rock, AR Kansas, and travels north at 70 kilometres per hour. Another train leaves at the same time and travel south at 80 kilometres per hour. How long will it take before they are 300 kilometers apart?

hours
Answer by richwmiller(17219)   (Show Source): You can put this solution on YOUR website!
300/(70+80)=300/150=2 hours
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