Question 116

All the faces of a cuboid arc painted. It is cut by planes parallel to its faces to form unit cubes. If the number of cubes having all unpainted faces is 1001, then the dimensions of , the cuboid are

Option A is correct choice.

Because ,if we cut the cube by $$13×9×15$$ dimensions,then all the faces with the color will be out side faces of the cuboid.

So, uncolored face will stay only inside the cuboid with $$(13-2)×(9-2)×(15-2)$$ or $$11×7×13$$ or 1001 number of small cuboid.

A is correct choice.

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