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The answer is 75 mph. If one travels at 45 mph for one mile, then in order to travel an average of 60 mph for the 2 miles, the rate must be 75 mph (60-45=15). Then add 15 to 60 to get the rate for the second mile. To check the answer add 75 and 45 and divide by 60 (the minutes in one hour) to get the distance (2 miles).

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Q: A car travels 1 mile at 45 miles per hour What must its average speed be for the next mile in order to average 60 miles per hour for the 2 miles?
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