The radius of the base circle of a circular cone is [[$ 2.0 $]] cm, but its height varies. Calculate the height of a circular cone if the exact value of its volume is

a) [[$ \displaystyle\frac {4} {3} \pi \;\text{cm}^3 $]].

Answer: The height of the circular cone is cm.

b) [[$ 4 \pi \;\text{cm}^3 $]].

Answer: The height of the circular cone is cm.

c) [[$ 6\displaystyle\frac {2} {3} \pi \;\text{cm}^3 $]].

Answer: The height of the circular cone is cm.

d) [[$ \pi \;\text{cm}^3 $]].

Answer: The height of the circular cone is cm.

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