Answer :
Given 360 revolution in 1 minutes
Or
360 revolution in 60 sec ( we know 1 minutes = 60 seconds )
So,
In 1 sec total revolution = = 6
And
We know in one revolution wheel turns 360
Therefore
In one second wheel turns 360 6 = 2160
And
We know 1 = Radian
So,
2160 =