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50 miles per hour.
The rate at which the lit portion of the moon moves per hour changes with latitude. The formula for finding the average rate of rotation per hour is: 15°cos(latitude). At the equator the equation would be 15°cos(0°)= 15° per hour.
The average speed for the entire trip is 9mph.
During the first hour, they covered (60 x 1) = 60 miles.During the next 2 hours, they covered (45 x 2) = 90 miles.The total distance covered was (60 + 90) = 150 miles.The average rate was (distance/time) = (150/3) = 50 miles per hour.
The car's average speed is 75 miles per hour.