Divide the circumference of a baseball by its diameter and you get 3.14. Divide the circumference of Earth by its diameter and you get 3.14. Divide the circumference of a pizza, coin or, well, pie and ...
An airplane, traveling with a constant engine speed, makes a large and perfect circle parallel to the ground. There is no wind. Will it complete the same circle in greater, less or the same time if ...
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