Riddle: Walking home one day, you take a short cut along the train tracks. The tracks cross a narrow bridge over a deep gorge. At the point you are 3/8 of the way across the bridge, you hear the train whistle somewhere behind you. You charge across the bridge, and jump off the track as the train is about to run you down. As it happens, if you had gone the other way, you would have reached safety just before being run over as well.

If you can run ten miles per hour, how fast is the train moving?
Answer: The train is moving at 40 miles per hour. Imagine that a friend is walking with you. When the train whistle blows, you head away from the train, he heads toward it. When he reaches safety, you will be 6/8 (or 3/4)of the way across the bridge, and the train will have just reached the bridge. For the train to cross 4/4 of the bridge in the time you cross the remaining 1/4, the train must be moving four times your speed.
SHARE
Share:
Cut Along the Tracks Riddle Meme.
Cut Along the Tracks Riddle Meme.
St Patricks Day Riddles are hand picked St Patricks Day Riddles for use by teachers in the classroom and for home school lessons. This st patricks day riddles quiz provides the option to be downloaded as a PDF or printable directly from the St Patricks Day Riddles quiz page.
Valentines Riddles are hand picked Valentines Riddles for use by teachers in the classroom and for home school lessons. This valentines riddles quiz provides the option to be downloaded as a PDF or printable directly from the Valentines Riddles quiz page.
New Years Riddles are hand picked New Years Riddles for use by teachers in the classroom and for home school lessons. This new years riddles quiz provides the option to be downloaded as a PDF or printable directly from the New Years Riddles quiz page.