This
problem can be solved as a minimization problem by using calculus, but the
following geometric solution is somewhat nicer. Cut the cube open and lay
it flat. Then the shortest distance is instantly visible.
One incomplete answer was received. Four incorrect submissions were received.
This
problem can be solved as a minimization problem by using calculus, but the
following geometric solution is somewhat nicer. Cut the cube open and lay
it flat. Then the shortest distance is instantly visible.
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Page last updated 9 March 1998.