SOLUTION: a plane averaged 500 miles per hour on a 4 hour flight. For the first three hours, the plane flew at 480 miles per hour. What was the speed of the plane, in miles per hour, during
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Question 482691: a plane averaged 500 miles per hour on a 4 hour flight. For the first three hours, the plane flew at 480 miles per hour. What was the speed of the plane, in miles per hour, during the last hour? Answer by jorel1380(3719) (Show Source):
