text: HOW TO CALCULATE VOLUME OF HOLLOW CONCRETE COLUMN
  
  # HOW TO CALCULATE VOLUME OF HOLLOW CONCRETE COLUMN
  
  The calculation of volume of hollow Concrete column is very easy and simple. For your better understanding lit's take this example.
  
  EXAMPLE: Lets take we have a column have a height 4 m and the inner radius of column is 0.2 m and outer is 0.5 m so calculate the volume of the Hallow column.
  GIVEN DATA:
  H = 4 m.
  R = 0.5 m.
  r = 0.2 m.
  #Where
  h = Height of the hollow column.
  R = Outer radius of the hollow column.
  r = Internal radius of the hollow column.
  The formula for calculating the volume of hollow column is given below:
  SOLUTION:
  Volume = (πR²h – πr²h)
  = πh ( R² – r²)
  = 3.14 x 4 ( 0.5² – 0.2²) [∵ π =3.14]
  = 12.56 ( 0.25 – 0.04)
  = 12.56 x 0.21
  = 2.6376 m³ Ans…..
  
  Source: civilclick.com