200rev/2min * 4/10 min = 40rev
So, it has rotated through 80π radians.
However, it's not clear what "the angle" at the center is. At any rate, the wheel is exactly back to where it started after 40 complete revolutions.
A wheel makes 200 revolutions in 2 minutes. Find the measure of the angle it describes at the center in 24 second s. (In radian)
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