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A carousel spins at a rate of ½ a round per second. If a point on its circumference is located 0.5 meters from the center of rotation, how many times approximately will this point reach its starting point in two minutes?
A. 25.
B. 30.
C. 60.
D. 120.
E. 180.
Correct Answer: C
Explanation/Reference:
Explanation:
If the carousel spins half a turn in one second then it spins once every two seconds. In two minutes there are 120 seconds and therefore the point will reach its starting point (120 / 2 = 60) times, no matter how far it is from the center of the circle.
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