What was the fan's angular acceleration, assumed constant?

A cooling fan is turned off when it is running at $850re\frac{v}{m}in.$ It

turns $1350$ revolutions before it comes to a stop.

Express your answer with the appropriate units.

Previous Answers Request Answer

Incorrect; Try Again; $5$ attempts remaining

Part B

How long did it take the fan to come to a complete stop?

Express your answer with the appropriate units.

$t=$