SOLUTION: it takes 5 min. for a 30 car train to cross a bridge. how long will it take a 45 car train (traveling at the same rate) to cross the same bridge?

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Question 925684: it takes 5 min. for a 30 car train to cross a bridge. how long will it take a 45 car train (traveling at the same rate) to cross the same bridge?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
5/30 = x/45
x = 45*(5/30)
x = 7.5 minutes
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