Question 764592: A train travels at 40 mph. If it takes 6 minutes to pass you, a stationary object, how long is the train?
Answer by ramkikk66(644)   (Show Source):
You can put this solution on YOUR website!
A train travels at 40 mph. If it takes 6 minutes to pass you, a stationary object, how long is the train?
Answer:
Train takes 6 min to pass you. That means that if the
head (engine) of the train crossed you at some time, the end of
the train crossed you 6 min later.
In the same 6 min, the how far would the engine of
train move? Obviously the length of the train.
So, in the 6 min that it takes to cross you, the distance
travelled by the train is nothing but the length of the
train.
Distance travelled in 60 min = 40 miles.
Therefore distance travelled in 6 min = 40*6/60 = 4 miles
So the length of the train is 4 miles.
That's a pretty long train :)
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