Homework Help: math

Posted by bob on Sunday, October 17, 2010 at 5:52pm.

a freight train that is 1 mile long is traveling at 60mph. a second train that is 2 miles long is traveling 40mph. the trains are moving in opposite directions on parallel tracks. how many seconds does it take between the time their locomotives meet and their cabooses fully pass each other?

math - bobpursley, Sunday, October 17, 2010 at 6:04pm
relative velocity=100mi/hr

distance: 2 miles

timeinhrs= distance/velocity convert that to seconds.
math - bob, Sunday, October 17, 2010 at 8:00pm
wouldnt the distance be 3 miles though if the one mile train must travel 1 mile (distance of itsself) plus the distance of the other train which is 2 miles?
math-College Algebra - Taylor, Friday, November 5, 2010 at 10:49am
1.8 minutes

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