1. The problem statement, all variables and given/known data The Sun rotates on its axis every 25 days. The sun currently has a radius of 7X10^8 m. When it expands into a Red Giant (in about 4 billion years) it will have a radius of 1.5X10^11 m. What will its rotational period be assuming the same mass for both, and they are both uniformly distributed spherical masses? (Note that these are not realistic assumptions) 2. Relevant equations T = square root of (4 x pi^2 x r^3/ G x m) G = 6.673x10^-11 3. The attempt at a solution T = 3.167x10^7 sec, 366.59 yrs Am I even answering the question asked?