A spinning disc rotating at 130 rev/min slows and stops 31 s later. How many revolutions did the disc make during this time?
A)34
B)67
C)8.4
D)17
E)4.2

Name: A spinning disc rotating at 130 rev/min slows and stops 31 s later. How many revolutions did the disc make during this time? A)34 B)67 C)8.4 D)17 E)4.2
Brand: Quizplus
Rating: 4.7 (41 reviews)

Question

Quizplus · Accepted Answer

The disc made 130 revolutions in 1 minute, so in 31 seconds it made 130 * 31 / 60 = 67 revolutions.

A Spinning Disc Rotating at 130 Rev/min Slows and Stops