Question

If a turntable rotates through 720degrees in one second, how many rotations does it make in one minute.

Answer 1

since in 360 ..... 1 rotation is completed
so in 720..... 2 rotation is completed.... in one second.
so in one minute(60 second) , number of rotation = 2×60=120

Answer 2

Explanation:

120 rotations

If a turntable rotates 720 degrees in one second; it will rotate twice in one second. So: Two rotations in one second x 60 seconds ( per minute) = 120 rotations in one minute.