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Multiple choice general knowledge math & puzzles

Two trains, 200 km apart, are moving toward each other at the speed of 50 km/hour each. A fly takes off from one train flying straight toward the other at the speed of 75 km/hour. Having reached the other train, the fly bounces off it and flies back to the first train. The fly repeats the trip until the trains collide and the bug is squashed.What distance has the fly traveled until its death?

  1. 160km

  2. 170km

  3. 150km

  4. 120km
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C Correct answer
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