With this information, you can calculate the quantity of knots 90 feet per minute is equal to.

¿What is the inverse calculation between 1 knot and 90 feet per minute?

Performing the inverse calculation of the relationship between units, we obtain that 1 knot is 1.1252066 times 90 feet per minute.

Which is the same to say that 90 feet per minute is 0.8887257 knots.

Ninety feet per minute equals to zero knots. *Approximation

A knot is one times ninety feet per minute. *Approximation