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What is the surface area of a sphere with a radius of 20 m?
300
How big is a 300 cubic feet truck?
300 cubic feet.
If you drill a hole twenty five feet deep and 8 inches in diameter how much concrete will it take to fill it in?
25 feet is equal to 300 inches. The radius of a hole is half its diameter, which equals 4 inches. The volume of the cylinder is given by the formula v = [Pi]r2h, so the volume of your hole is 3.14 * 16 * 300 = 15080 cubic inches. There are 1728 cubic inches to the cubic foot, so you'll need about 8.75 cubic feet of concrete, which is about a third of a yard. (More exactly, that's a cubic yard, but concrete guys just say "yard.")
What is the ratio of surface area to volume for a sphere with the following measurements surface area equals 300 meters squared volume equals 500 meters cubed?
It is not possible to have a sphere with a surface are of 300 metres squared and a volume of 500 metres cubed. A surface area of 300 sq metres would imply a volume of 488.6 cubic metres or a shape that is non-spherical!
Find the total surface area of this half sphere with a radius of 10?
Total surface area = (2*pi*r2)+(pi*r2) Area = 300*pi in square units
