document.write( "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? \n" ); document.write( "
Algebra.Com's Answer #561705 by TimothyLamb(4379)\"\" \"About 
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5/30 = x/45
\n" ); document.write( "x = 45*(5/30)
\n" ); document.write( "x = 7.5 minutes
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