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The diagonal of a square is . The diagonal of square with twice the area of is:

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answer is A.

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Detailed Solution

Concept- We will calculate the side of square B by calculating the area of both squares. Then, using the formula for finding diagonal of square, we will obtain the required diagonal of square.
Here, diagonal of square

.
If

be the side of square

, then

Also, area of the square

As area of

area of

,
Area of

Each side of the square

We know diagonal of square

Diagonal of square

Hence, the correct answer is option 1)

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