Question

The minute hand of a wall clock is 4.2 cm long .Find the area swept by it in 20 minutes.

Answer 1

In 20 min it will sweep 20/60= 1/3rd area of clock
Area of clock = (22/7)*4.2*4.2=55.38cm^2
Therefore it will sweep (1/3)*55.38=18.46 cm^2 area

Answer 2

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