Twelve 1 ohm resistances are used as edge to form a cube. The resistance between two diagonally opposite ...

Twelve 1 ohm resistances are used as edge to form a cube. The resistance between two diagonally opposite corners of the cube is: 

(1) 5/6 ohm (2) 1 ohm (3) 6/5 ohm (4) 3/2 ohm
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Twelve 1 ohm resistances are used as edge to form a cube. The resistance between two diagonally opposite corners of the cube is: 5/6 ohm.

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