The formula to calculate the volume of a pyramid is
[tex]V=\frac{1}{3}\times Base\text{ Area }\times Height[/tex]
The question gives the base area as 21 sq. inches and the height as 10 inches.
Therefore, we can calculate the volume by substituting the values as
[tex]\begin{gathered} V=\frac{1}{3}\times21\times10 \\ V=70in^3 \end{gathered}[/tex]
The volume is 70 cubic inches.
The correct option is the SECOND OPTION.
