58 and 2/3rds
Algebraic Steps / Dimensional Analysis 40 mi/hr*1 mi/s
3600 mi/hr*5280 ft/s
1 mi/s=58.66666667 ft/s
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1 mile per hour = 22/15 = 1.4666... feet per second (rounded, repeating)The following are exact numbers:-- 15 miles per hour = 22 feet per second-- 30 miles per hour = 44 feet per second-- 60 miles per hour = 88 feet per second-- 90 miles per hour = 132 feet per second-- 120 miles per hour = 176 feet per second
75 miles per hour = 110 feet per second
At 87 miles per hour you would be traveling 459,360 feet per hour OR 127.6 feet per second.
60 miles in one hour is the same as: 88 feet per second.
633600 feet per hour