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Please help me with the equation set up to see how far apart the 2 cities are! Thanks

2007-11-06 14:37:15 · 1 answers · asked by taburke52 1 in Science & Mathematics Geography

1 answers

let t equal the time (in hours) it takes train 1 to travel to the other city. Therefore:

(t)(90kph) = (t +2.5)(50kph)

thus: 90t = 50t + 125

thus: 40t = 125

thus: t = 3.125 hours

Now just multiple 3.125 hours times 90kph to get 281.15 kilometers

We can check our answer by solving for train 2: (3.125 hours + 2.5 hours)(50kph) =
(5.625)(50) = 281.25 kilometers {the same answer!}

Best wishes and good luck.

2007-11-06 14:51:36 · answer #1 · answered by Doctor J 7 · 0 0

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