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Area between x^2+y^2 le a^2 ,x^2/a^2+y^2...

Area between `x^2+y^2 le a^2 ,x^2/a^2+y^2/b^2 gt 1` is `30pi` and area between `x^2+y^2 le b^2 ,x^2/a^2+y^2/b^2 < 1` is `12pi` , then find the value of `(a-b)^2`

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JEE MAINS PREVIOUS YEAR-JEE MAIN 2022-Question
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