SOLUTION: A train leaves little rock, Arkansas, and travels north at 55 kilometers per hour. Another train leaves at same time and travels south at 80 kilometers per hour.?how long will it t

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Question 841802: A train leaves little rock, Arkansas, and travels north at 55 kilometers per hour. Another train leaves at same time and travels south at 80 kilometers per hour.?how long will it take before they are 540 kilometers apart?
Found 2 solutions by ewatrrr, richwmiller:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

A train leaves little rock, Arkansas, and travels north at 55 kilometers per hour. 

Another train leaves at same time and travels south at 80 kilometers per hour.?

how long highlight_green%28t%29 will it take before they are 540 kilometers apart?

D = rhighlight_green%28t%29

 55kmphhighlight_green%28t%29 + 80kmphhighlight_green%28t%29 = 540km

  t(55kmph + 80kmph) = 540km

        t = %28540%2F135%29+hr+=+%284hr%29

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
55t+80t=540
t=4