Question

The length of hour hand of a clock is 7 cm. Find the area swept by it in 40 minutes.​

Answer 1

Answer:

The length of the minute hand will be the radius of the sector are which it will sweep.

In 60 minutes (1 hr.) it sweeps 360°

So,

In 120 minutes (2 hr.) it will sweep 720° [It took revolutions, that area swept will also be counted]

Area of sector,

720/360 × π(7)²

2 × 22/7 × 7 × 7 cm²

308 cm²

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Step-by-step explanation: