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The length of the minute hand of a clock is 14 cm. The area swept by the minute hand in 5 minutes is(a) 153.9 cm²(b) 102.6 cm²(c) 51.3 cm²(d) 205.2 cm²Answer it with explanation |
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Answer» a is the correct option In 60 minutes, minute HAND completes 360 0 i.e., one rotation. ⇒ in 1 minute, minute HANDS completes 60 360
=6 Hence, in 5 minutes the angle covered is is 6×5=30 The angle of sector formed is 30 The area swept by the minute hand in 5 minutes= 360 30
×π×14×14 Using π= 7 22
, we get The area swept by the minute hand in 5 minutes = 3 154 sq. cm |
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