1. The diameter of a wet well is 10 feet. If filled to a depth of 12 feet, it will contain approximately how many gallons of water?

2. How many gallons of liquid can be held by a tank that measures 40 feet long by 25 feet wide by 12 feet deep?

3. Approximately how many gallons would 600 feet of 6-inch diameter pipe hold?

4. A water storage tank holds 323,136 gallons. If the water depth in the tank is 12 feet, what is the area of the tank is square feet?

5.The inside walls and bottom of a concrete tank must be painted. The floor of the tank is 25 feet long by 15 feet wide. If the tank is 12 feet deep and does not have a top, how many square feet must be painted?

Answers:

1. 0.785 X D X D X H = 0.785 X 10 ft X 10 ft X 12 ft = 942 cuft OR

(10 ft) / (2) = 5 ft then 3.14 X 5 ft X 5 ft X 12 ft = 942 cuft

2. 40 ft X 25 ft X 12 ft = 12,000 cuft then 12,000 cuft X 7.48 gal/cuft = 89,760 gal

3. (6 in) / (12 in/ft) = 0.5 ft

0.785 X D X D X Length = 0.785 X 0.5 ft X 0.5 ft X 600 ft = 117.75 cuft then 11,775 cuft X 7.48 gal/cuft = 881 gal OR

(0.5 ft) / (2) = 0.25 ft then 3.14 X 0.25 ft X 0.25 ft X 600 ft = 117.75 cuft X 7.48 gal/cuft = 881 gal

4. (323,136 gal) / (7.48 gal/cuft) = 43,200 cuft then (43,300 cuft) / (12 ft) = 3,600 sqft

5. Find area (L, ft X W, ft) of each side and bottom:

Long side = 12 ft X 25 ft = 300 sqft

Short side = 12 ft X 15 ft = 180 sqft

Bottom = 15 ft X 25 ft = 375 sqft

Now add them all together to get total sqft (since it is a rectangular tank there are 4 walls and a bottom = 300 ft + 300 ft + 180 ft + 180 ft + 375 ft = 1,335 sqft