Simple Ruby program that accepts a volume in cubic meters and gives the dimensions of shapes that contain that volume

volumes_to_shapes

class Volume_To_Shapes

  def initialize volume_input
    @volume_input = volume_input
    @height = cube_root @volume_input
    get_cube_dimensions
    get_sphere_dimensions
    get_cylinder_dimensions
    get_cone_dimensions
  end

  def cube_root input
    Math.exp(Math.log(input.to_f)/3.to_f).round(8)
  end

  def get_cube_dimensions
    puts "Cube: " + @height.round(2).to_s + "m on each side"
  end

  def get_sphere_dimensions
    puts "Sphere: " + (cube_root (0.75 * @volume_input / Math::PI) ).round(2).to_s + "m radius"
  end

  def get_cylinder_dimensions
    puts "Cylinder: " + Math.sqrt(@volume_input/ (Math::PI * @height)).round(2).to_s + "m radius, " + @height.round(2).to_s + "m height"
  end

  def get_cone_dimensions
    puts "Cone: " + Math.sqrt( 3 * ( @volume_input / (Math::PI * @height) ) ).round(2).to_s + "m radius, " + @height.round(2).to_s + "m height"
  end

end

Volume_To_Shapes.new 27

puts "-" * 40

Volume_To_Shapes.new 42

puts "-" * 40


Volume_To_Shapes.new 1000

puts "-" * 40

Volume_To_Shapes.new 2197