<p>A sphere of radius r inside a cube touches each one of the six sides of the cube. What is the volume of the cube, in terms of r?</p>
<p>Answer: 8r^3</p>
<p>Do I have to use a formula for this?</p>
<p>Picture a basketball in a cardboard box. If the radius of the basketball is r, then the length, width, and height of the box are all 2r. So the volume of the cube is l<em>w</em>h = 2r<em>2r</em>2r = 8r^3.</p>
<p>Oh lol i thought it said volume of a sphere for the longest time.</p>
<p>Does the SAT ask about area of a sphere or surface area of it? I need to brush up on surface area if it does.</p>
<p>The area of a sphere is the same thing as the surface area of a sphere. Perhaps you mean Volume? I have seen Volume problems, but the formula for Volume of a sphere was given in the problem. On the Math subject test these types of questions can be asked.</p>