Step1: Write out the formula
The volume of a pyramid is given by
[tex]\frac{1}{3}base\text{ area}\times height[/tex]step 2: Write out the given parameters
side=s, base area=s²
[tex]\text{base area=s}^2,\text{ height=}\frac{2}{3}s[/tex]Step3: substitute the parameters into the formula
[tex]\begin{gathered} \text{volume,v}=\frac{1}{3}\times s^2\times\frac{2}{3}s \\ =\frac{2}{9}s^3 \end{gathered}[/tex]Hence the volume V of the pyramid is (2/9)s³
Therefore the correct option is D
