Posted by paulie on Thursday, September 2, 2010 at 7:44am.
How many cars are there in a long freight train if it take the entire train 2 minutes to pass a station as it travels at 40 miles/hour? Each car is 50 feet long

science  drwls, Thursday, September 2, 2010 at 7:55am
40 miles/hr = 40*5280/60 = 3520 ft/min = 70.4 cars/min
140.8 cars pass in two minutes.

science  Laguna, Thursday, September 2, 2010 at 8:06am
As the train is travelling at 40 Miles per hour, in two minutes it will travel:
40 / 60 * 2 = 1.333 Miles.
There are 5280 feet in one mile, so that would make the train:
5280 * 1.334 = 7040 feet long
The cars are 50 feet long each, so that would make the train have:
7040 / 50 = 140.8 Cars Long.
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