Q17 of 43 Page 223

The minute hand of a circular clock is 15 cm long. How far does the tip of the minute hand move in 1 hour?

Length of minute hand of clock = 15 cm


We have to find out that how far will the tip of minute hand move in 1 hour


For this we have to find out the distance travelled by the tip of minute hand


∴ Distance travelled by the minute hand = Circumference of the clock


We know that,


Circumference of the circle = 2πr


= 2 × 3.14 × 15


= 30 × 3.14


= 94.2 cm


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