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प्रश्न
The hour hand of a clock is 6 cm long. The area swept by it between 11.20 am and 11.55 am is
विकल्प
2.75 cm2
5.5 cm2
11 cm2
10 cm2
उत्तर
Hour hand moves ` (1/2°)` in one minute.
So, area,
`=1/2(r^2)(θ/180 pi)`
`=1/2(36)(35/2(180)pi)`
`=5.5 cm^2`
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