7. Exercise Problem IV

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 (see Fig.).

 

 

Ans: \(cm^3\)

 

[Note: Enter the answer upto three decimal places.]