Quote:
Originally posted by Overscore
d=.5(aŚt^2)
d=.5(-2m/s^2Ś30s^2)
The train will travel -900m. 
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Didn't even see this. This is also correct. The train will travel -900m. How long would the train travel total? 1200 miles.
What's 1200-900=300 meters.
bdjuf where do you even address the time 30 seconds in your equation?