A Sandcastle mold is in the shape of a cone, with a diameter of 4 m and a height of 6 m. What volume of sand is needed to fill the mold? Use 3.14 for pi.
The radius of the cone is half of its diameter, so the radius is 4 m / 2 = <<4/2=2>>2 m.
The volume of a cone is given by the formula (1/3)πr²h, where r is the radius and h is the height.
Using the given values, the volume is (1/3) * 3.14 * 2² * 6 = 25.12 cubic meters of sand. Answer: \boxed{25.12}.