Help me find the volume please

Answer:
Step-by-step explanation:
The formula of a volume of a pyramid:
[tex]V=\dfrac{1}{3}BH[/tex]
B - area of a base
H - height
We have the square in the base with side length a = 11 in.
Area of a base:
[tex]B=11^2=121\ in^2[/tex]
Calculate the volume:
[tex]V=\dfrac{1}{3\!\!\!\!\diagup_1}(121)(15\!\!\!\!\!\diagup^5)=(1)(121)(5)=605\ in^3[/tex]