SOLUTION: A man has eight minutes to catch a train. The train station is 4 miles away. If he travels the first two miles at 20 mph, how fast will he have to drive for the remaining distance?
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Question 244061: A man has eight minutes to catch a train. The train station is 4 miles away. If he travels the first two miles at 20 mph, how fast will he have to drive for the remaining distance? Answer by solver91311(24713) (Show Source):
60 miles per hour is a mile per minute, so 20 miles per hour has to be a mile every 3 minutes. That means 20 miles per hour for 2 miles is going to take 6 minutes. That leaves 2 minutes left out of the 8 minutes he had to start with. Now he has to travel the last 2 miles in 2 minutes -- one mile per minute, or 60 miles per hour.
Except that will get him to the train station parking lot just as the train is leaving with 0 time to park the car, walk into the station, buy his ticket, and board the train.
