Hello!
Let's write some important information contained in the exercise:
• Formula: V=B*h
,• V = 18cm³
,• h = 3
Let's replace these values in the formula to find B:
[tex]\begin{gathered} V=B\cdot h \\ 18=B\cdot3 \\ \frac{18}{3}=B \\ \\ \boxed{6=B} \end{gathered}[/tex]The area of the base is 6cm².