48First of all, you must have meant cubic feet (volume) not square feet.The area of a 2 ft. diameter pipe is 2*2*Pi/4 = Pi = 3.1416 sq.ft.The volume = area*length = 3.1416*12 = 37.6991cu.ft."Diameter" implies a round pipe.
A circle with a 4-foot diameter has a circumference of about 12.57 feet.
Circumference = pi*diameter so diameter = circumference/pi = 40/pi = 12.7324 feet (to 4 dp)
I assume that you mean it's 4 ft in diameter, and you want to know the number of Sq Ft in the top. If so, the Area is equal to (Pi) X (Radius squared.) OR Since the Radius of a circle is 1/2 the Diameter ... the answer is [(4/2) X (4/2)] X Pi OR 4 X 3.14159 == 12.56636 Sq Ft
Assuming you mean diameter, the answer is 8 feet.
About 28,944.8L
How many gallons will fit into a 24 foot diameter x 4 foot high round swimming pool
21 foot what? Radius, diameter or circimference? Presumably 4 feet deep?
Does "15 foot round" refer to Perimeter, Diameter or Radius.
A 4' diameter table will have a circumference of ~12.5'. Assuming each person takes up just a little bit above 2', there should be enough room for a maximum of 6 people.
2/1/12th GALLON
If that is 4 feet tall and 18 inches in diameter, it would be 16.83 gallons.
Along the diameter, exactly 4 of them.
Trinity test, 5 foot diameter sphereHiroshima, 4 foot diameter 10 foot lengthNagasaki, 5 foot diameter 10 foot length
You need to know the depth of the pool in order to be able to answer this question. Unless it is a round pool and you are referring to 15 as the diameter and 4 as the depth then your pool is about 5,300 gallons
A 10-foot round slab at 4 inches requires 1 cubic yard.
There are 13,536 gallons in a 24 foot diameter pool that has 4 feet of water. Not true for a pool that is 4 feet in height. This would hold less than 4 feet of water.