Answer:
Volume of the shaded space = 4480.0 yd³
Explanation:
Volume of the shaded space = Volume of cuboid - Volume of Pyramid placed inside
Volume of cuboid = Length × Width × Height
= 28 × 12 × 20
= 6720 yd³
Volume of pyramid =

=

= 2240 yd³
Volume of the shaded space = 6720 - 2240
= 4480.0 yd³