math
posted by Amy .
A man is walking at an average speed of 4 miles per hour alongside a railroad track. A freight train, going in the same direction at an average speed of 30 miles per hour, requires 5 seconds to pass the man. How long is the freight train? Give your answer in feet.
What would be the equation?
I have trouble with word problems
I found a website that solved this problem but there wasn't really an answer.

the answer is 190.67
30 + 5 = 4 + x ?
then divide by 3600?
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