SOLUTION: the minute hand of a clock is 21cm long. the distance moved by the tips of the minute hand in 1 hour is ?----------- -.

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Question 785518: the minute hand of a clock is 21cm long. the distance moved by the tips of the minute hand in 1 hour is ?-------------.
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Circumference = Pi * diameter
diameter = 2* radius
Minute hand = radius
Diameter = 42cm
Circumference = Pi * 42cm
Circumference = 131.9cm.
The distance travelled by the minute hand.
Hope this helps.
:-)