What size does the radius of a sphere need to be for its volume to be larger than its surface area? hint! it is less than 10. hint! it is not a whole number. if you can show me a whole number for a radius where the surface area and volume are equal, then any radius bigger than that will have a larger volume. to get full points you will need to show me formulas for surface area of a sphere, volume of a sphere, and calculations on how you found your answer. question 1 options: the formula for the surface area of a sphere is 4 x pi x radius^2 the formula for the volume of a sphere is 4/3 x pi x radius^3.