Spider Ride*


by Henry E. Dudeney

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A rectangular box is 30 units long, 12 units wide, and 12 units high. A Spider starting from spot A should reach spot B. Spot A is midway from the sides of the box and 1 unit from its top. Spot B is midway from the sides of the box, 1 unit from the bottom of the box, and on the opposite side from A. The box, its dimensions and the proper locations of spots A and B are shown in the illustration.

What is the shortest way for the Spider to reach spot B? During the journey from A to B the Spider can use any side and edge of the box. Hint: the shortest distance between A and B is less than 42 units.

Last Updated: July 9, 2008  |  Posted: April 5, 2004
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