Final answer:
The shape of the tank is a cone, specifically an inverted conical shape that narrows towards the top.
Explanation:+
The shape of the tank in question is cone. When water is pumped into an inverted conical tank at a constant rate, the tank's shape is that of an upside-down cone, which is a conical shape that narrows towards the top. The term 'inverted' simply means that the cone's point is directed downwards, which is a typical configuration for such tanks when they are used for storage or processing that involves filling from the bottom.
The shape of the tank being described is an inverted cone. As water is being pumped into the tank at a constant rate, it will fill up the conical space. The reason for the inverted shape is that as more water is added, the base of the cone (which is facing upwards) will gradually expand, resulting in an inverted cone shape.