Answer :
Final answer:
To calculate the skating duration in minutes, divide the distance in kilometers by the speed in kilometers per hour to get the time in hours (80 km / 10 km/h = 8 hours), then multiply the time in hours by 60 minutes per hour (8 hours × 60 minutes/hour = 480 minutes). The correct answer is 480 minutes, or Option B.
Explanation:
If Benjamin skated 80 kilometers at 10 kilometers per hour, to find out how long he was skating, we can use the formula for time, which is time = distance / speed. In this case, the distance is 80 kilometers, and the speed is 10 kilometers per hour. So, the time in hours would be 80 km / 10 km/h = 8 hours.
Now, since we need to express the answer in minutes, we convert hours to minutes by multiplying by 60 minutes (since 1 hour equals 60 minutes). Therefore, we have 8 hours × 60 minutes/hour = 480 minutes.
So, the correct answer is 480 minutes, which corresponds to option B.
Next, check whether the answer is reasonable. Since traveling 10 km in one hour would be 60 minutes, traveling 80 km would be 8 times that amount, which is 8 × 60 minutes = 480 minutes. This confirms that our calculations are correct and reasonable.
