A spherical float has a volume of 0.17 m cubed and a mass of 54kg. It is held at the bottom of a pond by a rope. The pond is filled with water. The pond is 7.6m deep. The rope breaks. 1. What is the radius of the float? I figure that I use r=the cubde root of (3V/4pi) But I am not sure how to do this even if its the right way. 2. What density of fluid would allow the float to float on its surface with 25% of its volume above the liquid air interface? My teacher and I have no clue how to do this. Any help would be great.