Question

sσℓvє τнє ρrσвℓєм αвσvє​

Answer 1

• 1232 cm² is the required answer.

Given:-

• Length of minute hand = 14 cm
• Time taken ,t = 120 min

To Find:-

• Area covered by Minute Hand

Solution:-

• As we know that when minute hand Complete 1 round then the angle made by them is 360° .

• When minute hand Complete 1 round then its take 60 Min.

Then, angle made by minute hand each min

• → Angle made by minute hand per minute = 360/60 = 6°

• Therefore, at per minute minute hand made 6° angle.

• The angle made by minute hand in 120 min = 120×6 = 720°

• Therefore, the area covered by mirror hand = θ/360 × πr²

• → The area covered by mirror hand = 720/360 × 22/7×14²

• → The area covered by mirror hand = 2 × 22/7 × 196

• → The area covered by mirror hand = 44/7 × 196

• → The area covered by mirror hand = 44×28

• → The area covered by mirror hand = 1232 cm²

• Hence, the area covered by minute hand is 1232 cm².