For the section shown below, second moment of the area about

For the section shown below, second moment of the area about an axis d/4 distance above the bottom of the area is

MI about neutral axis

=	1	bd³
	12

Seund MI = I_ca + Ax^-2
(parallel axis theorem)

=	1	bd³ + bd ×		d		²
	12			4

b² + ω²

	7bd³
	48