With this information, you can calculate the quantity of feet per minute 668 knots is equal to.
¿What is the inverse calculation between 1 foot per minute and 668 knots?
Performing the inverse calculation of the relationship between units, we obtain that 1 foot per minute is 1.478253e-05 times 668 knots.
Which is the same to say that 668 knots is 67647.419 feet per minute.
Six hundred sixty-eight knots equals to sixty-seven thousand six hundred forty-seven feet per minute. *Approximation
A foot per minute is one times six hundred sixty-eight knots. *Approximation