The length of the minute hand of a circle is 42 cm find the area swept by the minute hand in 20 minute
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Answer:
1848 cm square units
Area of a full circle with radius 42cm with 360 degree=
(22/7)x42x42 ==5544 cm square units.
Angle covered by minute hand in 20 minutes = 120 degree
so the required angle ===5544 x 120 /360
====1848 cm square units
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