SOLUTION: There's a train going 165 mph and you are going 54 miles per hour, you intersect in 10 miles but then it starts to rain and slows the train by 5 miles. Then the wind picks up and y
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Question 561626: There's a train going 165 mph and you are going 54 miles per hour, you intersect in 10 miles but then it starts to rain and slows the train by 5 miles. Then the wind picks up and you go 1 mile slower... how much should you speed up to miss the train? Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! There's a train going 165 mph and you are going 54 miles per hour, you intersect in 10 miles but then it starts to rain and slows the train by 5 miles.
Then the wind picks up and you go 1 mile slower... how much should you speed up to miss the train?
:
Find what is happening before the wind and rain:
You are 10/54 * 60 = 11.111 min from intersecting
:
Find the trains dist at this time
11.111/60 * 165 = 30.555 mi from the intersection
:
Train 5 mph slower: 30.555/160 * 60 = 11.458 min from intersection
Car 1 mph slower: 10/53 * 60 = 11.32 min; cutting it pretty close
:
To miss the train by about half a minute speed back up to 54 mph
11.458-11.111 = .347 min or a comfortable .347(60) = 21 seconds before the train arrives.
