Aswimming pool is being filled with water. the diameter of the pool is 27 feet, and the height if 4 feet. which formula represents the correct way to find the volume of the pool?

If you are using the word diameter, I am going to assume that the pool is round.  A round pool represents the shape of a cylinder.  The volume for a cylinder is .  Diameter is twice the radius, so our radius is half of 27 which is 13.5 feet.  So our formula is .  That's the forumula for it.  That actual volume measure is , or multiplying in pi as 3.14, it's 2289.06 cubic feet.

This does not make sense

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's