試題詳解

3、 Using the parallel-axis theorem, determine the product of inertia of the area shown with respect to the centroidal x and y axes ( Ixy)？ 
(A)138.24×10³ mm⁴
(B) 69.12×10⁶ mm⁴
(C) 138.24×10⁶ mm⁴
(D) 69.12×10³ mm⁴。