The length of the minute of a watch is 42 mm. The area swept by it in 30 minutes (in mm2) by taking π as 3.14 is:
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Heya!!
length of minute hand = 42 mm = radius of it
Angle made by it in 30 min. = 180° = pi
Now,
Area swept by it in 30 min. = Area of sector
= theta/360° × pi * r^2
= 180/360 × 3.14 × 42× 42
= ( 3.14 × 42 × 42) / 2
= 2769.4 mm^2
Hence, the area swept by it is 2769.4 mm^2.
Hope it helps uh:)
length of minute hand = 42 mm = radius of it
Angle made by it in 30 min. = 180° = pi
Now,
Area swept by it in 30 min. = Area of sector
= theta/360° × pi * r^2
= 180/360 × 3.14 × 42× 42
= ( 3.14 × 42 × 42) / 2
= 2769.4 mm^2
Hence, the area swept by it is 2769.4 mm^2.
Hope it helps uh:)
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