Consider the beam in (Figure 1) with $a = 420$ mm.
Figure
Determine the moment of inertia of the beam's cross-sectional area about the $x$ axis.
Express your answer to three significant figures and include the appropriate units.
$I_x = 3.00$ mm
Incorrect; Try Again; 3 attempts remaining
200 mm
100 mm
50 mm
50 mm
$a$