The minute hand of a clock is 6 cm long.The area swept by it between 11:20 am and 11:55 am is a) 36cm² b) 66 cm² c)60 cm² d) 96 cm²
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b) 66 sq. cm
Total area of Clock = πr^2
= 22/7 × 6 × 6 = 113.142 sq. cm
Area swept by one minute = 113.142/ 60
= 1.8857 sq. cm
No. of Min.s from 11:20 to 11:55 = 35 min
Area swept by 35 min.s = 35 × 1.8857
= 66 sq. cm
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