The sector in the given image is half of a quarter circle. The radius of the sector is 10 cm. If it rotates 90° clockwise about its centre, what is the total area (in $c m^{2}$ ) swept by it?

25𝜋

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37.5𝜋

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42.5𝜋

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50𝜋

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Solution

The correct option is B 37.5𝜋

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The sector in the given image is half of a quarter circle. The radius of the sector is 10 cm. If it rotates 90° clockwise about its centre, what is the total area (in cm2) swept by it?

The correct option is B 37.5𝜋

The sector in the given image is half of a quarter circle. The radius of the sector is 10 cm. If it rotates 90° clockwise about its centre, what is the total area (in $c m^{2}$ ) swept by it?