60 mph = 88 feet per second
70 mph/60 mph x 88 = 102.6 feet per second
or multiply mph x about 1.46
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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
Assuming the question is refering to feet PER second and miles PER hour, 176 fps = 120 mph
Miles per hour x 1.467 = feet per second.
66 feet per second = 45 mph.
Use this formula: feet per second x 0.6818 = miles per hour:325 ft/sec x 0.6818 = about 221.6 miles per hour