$\"\"$

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The inner rectangle sides are $\"\"$ and $\"\"$ .

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The outer rectangle sides are $\"\"$ and $\"\"$ .

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Find the shaded area of the rectangle.

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Area of the rectangle form is $\"\"$ .

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Area of the inner rectangle is $\"\"$ .

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Area of the outer rectangle is $\"\"$ .

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Area of the shaded region is $\"\"$ .

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Since area of the shaded region is $\"\"$ .

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$\"\"$

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Option H is right choice.