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Solution 4.1:9

From Förberedande kurs i matematik 1

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10 seconds corresponds to 61 minutes, so that during that time period, the second hand sweeps over 61 of a turn, i.e. the sector of a circle with angle


=612 radians =3 radians


Image:4_1_9_.gif


The area of the sector is

Area =21r2=2138 cm2=332 cm2335 cm2 

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