With this information, you can calculate the quantity of feet per second 21 kilometers per hour is equal to.
¿What is the inverse calculation between 1 foot per second and 21 kilometers per hour?
Performing the inverse calculation of the relationship between units, we obtain that 1 foot per second is 0.052251429 times 21 kilometers per hour.
Which is the same to say that 21 kilometers per hour is 19.138233 feet per second.
Twenty-one kilometers per hour equals to nineteen feet per second. *Approximation
A foot per second is zero times twenty-one kilometers per hour. *Approximation
