SOLUTION: The large hand of a clock is 5cm long. How many centimetre does its extremity move in 20 minutes
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Question 1052330: The large hand of a clock is 5cm long. How many centimetre does its extremity move in 20 minutes
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
There are 60 minutes in an hour, so 20 minutes is 20/60 = 1/3 of the circle
:
circumference(C) of the circle is pi * D, where D is the diameter
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D = 2 * r, where r is the radius
:
For our problem,
:
D = 2 * 5 = 10 cm
:
C = pi * 10 = 31.4286 cm
:
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The end of the large hand moves 31.4286 / 3 = 10.4762 cm
in 20 minutes
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