300
300 cubic feet.
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.")
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!
Total surface area = (2*pi*r2)+(pi*r2) Area = 300*pi in square units
300
300
There are 49,152 pennies in a cubic foot. That's a little over 300 pounds of pennies.
2,244 gallons of water.
48m2
not possible to answer unless given 300 kg per what volume
The ratio is 300 m2/500 m3 = 0.6 per meter.(Fascinating factoid: The sphere's radius is 5 m.)
The volume of the pipe can be calculated using the formula for the volume of a cylinder: V = πr^2h, where r is the radius and h is the height. Given that the diameter is 4 inches, the radius is 2 inches. Converting all measurements to feet, the volume would be approximately 11.96 cubic feet.
a 300 liter or bigger tank
300 m^2
It would smash the Earth to pieces and fling the fragments into the void. However, a 300-foot sphere of neutronium would likely explode instantly, since that isn't enough mass to keep it in a collapsed-matter state.
300 cubic feet.