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About 6.24 seconds at 45mph to travel 412 feet.
5.25 miles per hour.
7.5 miles per hour.
167/308 seconds ≈ 1.22 seconds. 1 hour = 3600 seconds 1 miles = 5280 feet ⇒ 28 miles = 28 x 5280 feet = 147840 feet ⇒ mph = 147840 feet ÷ 1 hour = 147840 ÷ 3600 feet/second = 616/15 ft/s time = distance ÷ speed = 50 feet ÷ 28 mph = 50 feet ÷ (616/15 ft/s) = 375/308 seconds ≈ 1.22 seconds
First, convert the hours to seconds:10 miles/hour x 1 hour/3600 seconds = .002777 miles/secondNext, convert the miles to feet:.002777 miles/second x 5280 feet/mile = 14.67 feet/second