Hey i'm failing and really need , all effort is appreciated : ) drag and drop an answer to each box to correctly complete the explanation for deriving the formula for the volume of a sphere. for every corresponding pair of cross sections, the area of the cross section of a sphere with radius r is equal to the area of the cross section of a cylinder with radius r and height 2r minus the volume of two cones, each with a radius and height of a cross section of the sphere is and a cross section of the cylinder minus the cones, taken parallel to the base of cylinder, is the volume of the cylinder with radius r and height 2r is , and the volume of each cone with radius r and height r is 13πr3 . so the volume of the cylinder minus the two cones is 43πr3 . therefore, the volume of the cylinder is by cavalieri's principle.