Question

3. A drill spins with a frequency of 1200 RPM (revolutions per minute). What is its

Answer 1

Your answer is 20
just take 1,200 divided by 60 [second] :)

Answer 2

Frequency = 1200 rev/minute

Frequency = (1200 rev/minute) · (1 minute / 60 seconds)

Frequency = (1200 / 60) (rev - minute / minute - seconds)

Frequency = 20 rev/second