SOLUTION: A train travels from point A to B, a distance of 100 miles, at a speed of 20 mph. If it had gone two and a half times faster, how much earlier would it have arrived at B?

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Question 898089: A train travels from point A to B, a distance of 100 miles, at a speed of 20 mph. If it had gone two and a half times faster, how much earlier would it have arrived at B?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
100/20=5 hours
(2.5*20)*t=100
50t=100
t=2
5-2=3 hours earlier