Problem

\( 2(1+\sqrt{2}) 70^{2} \)

Answer

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Answer

\( 9800 + 13856\sqrt{2} \)

Steps

Step 1 :\( 2(1+\sqrt{2}) 70^{2} \)

Step 2 :\( 2(1+\sqrt{2}) \times 4900 \)

Step 3 :\( 9800 + 13856\sqrt{2} \)

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