SOLUTION: A train leaves little rock, Arkansas, and travels north at 85 kilometers per hour. Another train leaves at the same time and travels south at 90 kilometers per hour. How long ( hou

Question 851320: A train leaves little rock, Arkansas, and travels north at 85 kilometers per hour. Another train leaves at the same time and travels south at 90 kilometers per hour. How long ( hours) will it take before they are 525 kilometers apart?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

 85kmph*t + 90kmph*t = 525km

      t =  = 3 hr, time it will take before they are 525km apart 

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