Final answer:
To convert 12 km in 3.5 hours to meters per minute, we convert 12 km to 12,000 meters and 3.5 hours to 210 minutes. Dividing the total meters by the total minutes gives us approximately 57.14 m/min. Answer A) 57.14 m/minute is correct and reasonable when checked.
Step-by-step explanation:
To convert 12 km in 3.5 hours to meters per minute, we will first convert kilometers to meters and hours to minutes. There are 1,000 meters in a kilometer and 60 minutes in an hour.
- Convert 12 kilometers to meters: 12 km × 1,000 m/km = 12,000 meters.
- Convert 3.5 hours to minutes: 3.5 hr × 60 min/hr = 210 minutes.
- Calculate the speed in meters per minute: 12,000 m / 210 min = approx. 57.14 m/min.
Therefore, the correct answer is A) 57.14 m/minute. It is important to check if the answer is reasonable: a speed of 10 km in 20 min means 30 km in an hour, so approximately 57 m/min for 12 km in 3.5 hours seems reasonable.