A hemisphere is the name of a solid that is half of a sphere.
Therefore, the volume of a hemisphere with radius r is half the volume of a sphere with radius r.
Volume of a Hemisphere [0.8em]
V=1/2(4/3π r^3) ⇔ V=2/3π r^3
To use this formula we first need to calculate the radius. To do so, we will consider the given fact that the circumference of the great circle is about 18feet. Let's recall the formula for the circumference with radius r.
C=2Ï€ r
We can substitute 18 for C in the above formula and solve for the radius r.
