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Ball and Train

Science brain teasers require understanding of the physical or biological world and the laws that govern it.

 

Puzzle ID:#2575
Fun:*** (2.21)
Difficulty:* (1.04)
Category:Science
Submitted By:204_blaze_41****

 

 

 



You're on a train that's moving forward at 50 mph. You throw a ball in the direction that the train is moving. Relative to you and the train, the ball leaves your hand travelling at 20 mph.

From the point of view of someone standing alongside the tracks, how fast is the ball moving?




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