To calculate the average speed of the amateur race car driver over the two heats, we need to first determine the total distance covered and the total time taken.
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Total Distance: The driver competed in two heats, both 26 kilometers long. Therefore, the total distance is: \[ \text{Total Distance} = 26 \text{ km} + 26 \text{ km} = 52 \text{ km} \]
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Total Time: The time for the first heat was 6 minutes, and the time for the second heat was 7 minutes. Converting these times into hours (since we want the average speed in kilometers per hour): \[ 6 \text{ minutes} = \frac{6}{60} \text{ hours} = 0.1 \text{ hours} \] \[ 7 \text{ minutes} = \frac{7}{60} \text{ hours} \approx 0.1167 \text{ hours} \] Now, we can calculate the total time: \[ \text{Total Time} = 0.1 \text{ hours} + 0.1167 \text{ hours} \approx 0.2167 \text{ hours} \]
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Average Speed: The average speed is calculated by dividing the total distance by the total time: \[ \text{Average Speed} = \frac{\text{Total Distance}}{\text{Total Time}} = \frac{52 \text{ km}}{0.2167 \text{ hours}} \approx 239.0 \text{ km/h} \]
Thus, the average speed of the race car driver is approximately 239.0 kilometers per hour when rounded to the nearest tenth.