1. The problem statement, all variables and given/known data Determine the rectangular and polar radii of gyration of the shaded area about the axes shown. 2. Relevant equations dIx = y2dA Ix = ∫y2dA dA = ydx A = ∫(dA 3. The attempt at a solution dIx = y2dA =(x6/16) *(x3/4) dx =(x9/64)dx Ix =(integrating from 1 to 2) ∫dIx = 1023/640 dA = ydx A = (integrating from1 to 2)∫(x3/4)dx = 15/16 kx = √(Ix/A) = 1.705 I am getting the radius of gyration about y axis correctly but that baout x axis is wrong. The actualy answer given is 0.75. I am unable to figure out where I am going wrong.