While at the park I wondered what the volume of this tunnel would be. The diameter of the opening is 150cm and the length of the tunnel is 600cm. I know that the radius is half of the tunnel opening so it’s 75cm. If you use a calculator you can times pi by the radius squared and then times that by the height. The tunnel is a cylinder on its side so the height is actually the length. I think it is 10 602 875cm³ which is 106 028.75m³.
