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Monday, February 15, 2010
One fly and two colliding trains.
Two trains are running one against the other at 50 km/h each. They are 100Km far away. Soon they will collide. One fly is flying from one train to another, first it moves in one direction and as soon as it touches one train it flyies back in the other direction. The fly has a 30Km/h speed. How much space will the fly cover?