Question

Q. There are four blades of same size of a circular fan of radius 20cm, find the area of each blade.

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Answer 1

Each Angle = 360 / 8 = 45 ⁰

So , area of 4 blades = 4 × θ / 360 × πr²

= 4 × 45 / 360 × π20²

= 628 cm²

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