Spinning Wheel
Geometry
Level
2
A wheel has a radius of 21 cm. The wheel spins at a speed of for 2 minutes. How many times does the wheel spin?
The answer is 100.
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1 solution
The distance traveled = The number of spins x The wheel's perimeter 1.1 m/s x 120 s = n x 22/7 x 2 x 21 cm 132 m = 1.32 m x n n = 100 times