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The minute hand of a clock is √21 cm long. Find area described by the minute hand on the face of clock between 7 am and 7:05 am

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Radius of minute hand (r) = √21 cm

For 1hr = 60 min, minute hand completes one revolution = 360°

60 min = 360°

1 min = 6°

From 7 am to 7:05 am it is 5 min angle subtended = 5 x 6°=30°=θ

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