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In a shopping mall there is a hall of cu...

In a shopping mall there is a hall of cuboid shape with dimension `800 times 800 times 720` units, which needs to be added the facility of an escalator in the path as shown by the dotted line in the figure. Find
the minimum total length of the escalator.

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The correct Answer is:
380 units
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SURA PUBLICATION-TWO DIMENSIONAL ANALYTICAL GEOMETRY-EXERCISE 6.2
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