With this information, you can calculate the quantity of miles per hour 21 feet per minute is equal to.
¿What is the inverse calculation between 1 mile per hour and 21 feet per minute?
Performing the inverse calculation of the relationship between units, we obtain that 1 mile per hour is 4.1904762 times 21 feet per minute.
Which is the same to say that 21 feet per minute is 0.23863636 miles per hour.
Twenty-one feet per minute equals to zero miles per hour. *Approximation
A mile per hour is four times twenty-one feet per minute. *Approximation
