The minute hand of clock is 20cm long. Find the area swept by the minute hand between 8.30 p.m and 8.50 p.m .
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If you observe the clock between 8:30 PM and 8:50 PM then you will see that the minute hand covers an area of 1/3 rd of the whole circle that is-
22×20×20÷100÷100÷7 sq.cm
= 3.14 ÷ 25 sq.cm
= 0.1256 sq.cm
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