Find the length of diagonal of a square whose area is\[~78400\text{ }c

1.	Find the length of diagonal of a square whose area is\[~78400\text{ }c{{m}^{2}}.\]
A.	\[280\sqrt{2}\]
B.	\[28\sqrt{2}\,cm\]
C.	\[280cm\]
D.	\[280\sqrt{3}\,cm\]
Answer» B. \[28\sqrt{2}\,cm\]

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Find the length of diagonal of a square whose area is\[~78400\text{ }c{{m}^{2}}.\]

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