218 fps = 1486.36 mph
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Since the acceleration is uniform you can add the starting and ending velocities and divide by two the average speed 145 + 73 = 218 218/2 = 109 (units not given so I assume Miles per Hour) To convert to Feet per seconds 109 mph X 5280 feet in a mile / 3600 seconds in an hour = 159.866667 feet per second multiply the above by 15 seconds and you get 2398 feet
There are 12 inches in one foot. Therefore, 218 inches is equal to 218/12 = 18.16 recurring (that is, 18.16666...) feet or 18 feet 2 inches.
60 minutes = 1 hour so 218 minutes = 218/60 hours.
218 squared meters * 10.764 squared feet per squared meter = 2346.552
Multiply square feet by 0.092903 to get square meters.In this case, 218 x 0.092903 = 20.2528 square meters.