### How many gallons of water does a six inch column that is 400 feet deep in the ground hold?

Assuming that the 6-in is the diameter of the column that is 400-ft long. The volume of a cylinder equals the (area of the base)*height = h[pi]r^2 Area of the base equals area of a circle equals [pi]r^2 r is the radius and equals 1/2 the diameter--.5 ft/2 or .25-ft [pi].25^2 equals .19635 *400-ft equals 78.53982ft� There are 7.48051948 US Gallons per cubic foot 78.53982ft� x 7.48051948 = 587.519 gallons (US Liquid)

### How do you convert 1000 sq ft into square meters?

A square foot is a measure of area; 1 sq ft equals the area of a rectangle that is 1 ft wide and 1 ft long. Likewise, 1 square meter equals the area of a rectangle whose sides are 1 m long. For a square with width w and length l, you get the area a by multiplying: a = w * l As 1 ft = 0.3048 m, this equates to 1 sq ft…