With this information, you can calculate the quantity of feet per minute 685 knots is equal to.

¿What is the inverse calculation between 1 foot per minute and 685 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per minute is 1.4415664e-05 times 685 knots.

Which is the same to say that 685 knots is 69368.985 feet per minute.

Six hundred eighty-five knots equals to sixty-nine thousand three hundred sixty-eight feet per minute. *Approximation

A foot per minute is one times six hundred eighty-five knots. *Approximation