A pen stand made of wood is in the shape of a cuboid with four conical depressions to hold pens. The dimensions of the c

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Q 3082723637.     A pen stand made of wood is in the shape of a cuboid with four conical depressions to hold pens. The dimensions of the cuboid are `15` cm by `10 cm` by `3.5 cm`. The radius of each of the depressions is `0.5 cm` and the depth is `1.4 cm`. Find the volume of wood in the entire stand .

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