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December 21, 2014

December 21, 2014

Posted by **Francessca** on Friday, June 3, 2011 at 11:35pm.

- Algebra -
**drwls**, Saturday, June 4, 2011 at 5:43amV = slower train speed

V + 20 = faster train speed

T = number of hours required by both

V*T = 150

(V + 20)*T = 250

V*T + 20T = 250

20 T = 100

T = 5 hours

V = 150/T = 30 mph

faster train speed = V + 20 = 50 mph

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