Can someone help with explanation please:)

Answer:
Step-by-step explanation:
Volume of triangular prism:
[tex]V_{1}[/tex] = [tex]A_{base}[/tex] × H
Volume of triangular pyramid:
[tex]V_{2}[/tex] = [tex]\frac{A_{base} *H}{3}[/tex]
The total volume of figure is
V = [tex]V_{1}[/tex] + [tex]V_{2}[/tex]