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Un article trouvé pour ce sujet.
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The Metra and the Amtrack |
2006-12-03 |
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Amy pose la question :
A Metra commuter train leaves Union Station in Chicago at 12 noon. Two hours later, an Amtrak train leaves on the same track, traveling at an average speed that is 50 miles per hour faster than the Metra train. At 3PM the Amtrak train is 10 miles behind the commuter train. How fast is each going?
Stephen La Rocque and Penny Nom lui répond. |
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