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प्रश्न
The minute hand of a clock is 8 cm long. Find the area swept by the minute hand between 8.30 a.m. and 9.05 a.m.
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उत्तर
The time interval is 9.05 - 8.30 = 35 minutes
Area covered in one 60 minutes = π x r2 = `22/7xx8^2` = 201 cm2
Hence area swept in 35 minutes is given by
A = `201/60 xx 35 = 117 1/3`cm2.
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