Answer:
With a 6.7-foot diameter, the hemisphere's volume equals to 78.7 cubic feet.
Step-by-step explanation:
Volume of sphere = (4 * π / 3) * r ^ 3 , where r = diameter / 2.
So, volume of hemisphere = volume of sphere / 2 .
Volume of sphere = (4 * π / 3) * (6.7 / 2) ^ 3 = 157.47914.....
Volume of hemisphere = 157.47914....... / 2 = 78.7396...
Thus, it would be around 78.7 cubic feet.