Provide quick solution for the given problem. Solve and box the final answer. WRITE LEGIBLY.
Extracted text: A C-channel has a dimensions of 275 mm by 425 mm, with a thickness of 45 mm. Determine the moment of inertia about x-axis, if the x-axis is also the neutral axis. 155 425 155 275 Answer should be in mm^4, not in scientific notation. Sample answer format: 123456789.1234