1.

The maximum length of a pencil that can be kept in a rectangular box of dimensions \[8\text{ }cm\times 6\text{ }cm\times 2\text{ }cm,\]is ______.

A. \[2\sqrt{13}cm\]            
B. \[2\sqrt{14}cm\]
C.        \[2\sqrt{26}cm\]
D.        \[10\sqrt{2}cm\]
Answer» D.        \[10\sqrt{2}cm\]


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