With this information, you can calculate the quantity of knots 91 feet per minute is equal to.
¿What is the inverse calculation between 1 knot and 91 feet per minute?
Performing the inverse calculation of the relationship between units, we obtain that 1 knot is 1.1128417 times 91 feet per minute.
Which is the same to say that 91 feet per minute is 0.89860043 knots.
Ninety-one feet per minute equals to zero knots. *Approximation
A knot is one times ninety-one feet per minute. *Approximation