If the minute hand of a clock is 12 cm long, how far does the tip of the hand move in 20 minutes?
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If the minute hand of a clock is 12 cm long, how far does the tip of the hand move in 20 minutes?
In an hour, the minute hand goes all the way around, that is, 24 cm • π = 75.40 cm.
In a third of an hour, it goes a third of that circumference: 75.40 cm / 3 = 25.13 cm.
Do you know why we used 24 cm instead of 12 cm in the first step?
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