The edge of a cube is of length -a- then the shortest distance between the diagonal of a cube and an edge skew to it is

The edge of a cube is of length -a- then the shortest distance between

1.	The edge of a cube is of length -a- then the shortest distance between the diagonal of a cube and an edge skew to it is
A.	\[a\sqrt{2}\]
B.	a
C.	\[\sqrt{2}/a\]
D.	\[a/\sqrt{2}\]
Answer» E.

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The edge of a cube is of length -a- then the shortest distance between the diagonal of a cube and an edge skew to it is

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