With this information, you can calculate the quantity of knots 31 feet per minute is equal to.
¿What is the inverse calculation between 1 knot and 31 feet per minute?
Performing the inverse calculation of the relationship between units, we obtain that 1 knot is 3.2667288 times 31 feet per minute.
Which is the same to say that 31 feet per minute is 0.30611663 knots.
Thirty-one feet per minute equals to zero knots. *Approximation
A knot is three times thirty-one feet per minute. *Approximation