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Bette drives at 60 miles per hour for 2 and a half hours and at 75 miles per hour for 1 and a half hours what is her average rate of speed?
Wiki User
∙ 13y ago
Average speed = (total distance covered) divided by (time to cover the distance)
Distance in the first 2.5 hours = (2.5 x 60) = 150 miles
Distance in the next 1.5 hours = (1.5 x 75) = 112.5 miles
Total distance = (150 + 112.5) = 262.5 miles
Total time = (2.5 + 1.5) = 4 hours
Average speed = (262.5/4) = 65.625 miles per hour
Wiki User
∙ 13y ago
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