60 mph = 88 fps (exactly)
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To convert 440 feet per minute to miles per hour, first, we need to convert feet to miles. There are 5,280 feet in a mile. So, 440 feet per minute is equal to 440/5280 = 0.0833 miles per minute. Next, we need to convert minutes to hours. There are 60 minutes in an hour. Therefore, 0.0833 miles per minute is equal to 0.0833 x 60 = 4.998 miles per hour. So, 440 feet per minute is equal to approximately 4.998 miles per hour.
Miles per hour x 1.467 = feet per second.
Multiply by 88.
Use the facts that there are 5,280 feet per mile and 3600 seconds per hour.
Use this formula: feet per second x 0.6818 = miles per hour:325 ft/sec x 0.6818 = about 221.6 miles per hour