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Train Speed is a puzzle in the European version of Professor Layton and the Curious Village. For the puzzle in the American version of the game, go here.
Puzzle
A train with a length of 100m takes 30 seconds to travel over a 400m bridge.
Assuming that the train's speed is constant, how many kilometres per hour is it travelling at?
Hints
Solution
Incorrect
Too bad!
Correct
That's right!
The answer is just a matter of arithmetic, but you need to be using the right figures. If the time between the front of the train travelling onto the bridge and the back of the train travelling off the bridge is 30 seconds, then the distance travelled in that time is 500m. This means the train travels 1km per minute, which is 60 km per hour.
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