In detail

Cross the pit

Cross the pit

We are on the outside of a moat that surrounds the central area with water. The width of the pit is 5 meters and we have two boards of 5 meters to pass. We cannot do it using a single plank since it would fall into the pit.

How can we cross the pit using the two boards?

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The solution involves placing one of the boards in the corner and from there the other board to the central area as shown in the following image.