The volume of sphere with a radius of 7 is: 1,436.8 units3
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Raduis = 6.966 units.
Volume of sphere: 4/3*pi*9^3 = 972*pi cubic meters
The volume of a sphere with a diameter of 7 meters is about 179.6m3
The volume of a sphere is [ 4/3 pi R3 ], so half of it is [ 2/3 pi R3 ]= (2/3) (pi) (103) = 2,000/3 pi = 2,094.395(rounded)
Assuming that voulme = volume and raduis = radius, the answer is 301.6 cubic inches.