Question

What is the volume of an equilateral triangular prism?

Answer 1

actually, the "slant height" is 4, but the vertical height or "altitude" of the equilateral triangle is not 4

but anyway.....$\bf \begin{array}{cllll} \textit{height of an equilateral triangle}\\\\ h=\cfrac{s\sqrt{3}}{2}\\ ----------\\ \textit{area of an equilateral triangle}\\\\ A=\cfrac{s^2\sqrt{3}}{4} \end{array}\qquad s=\textit{length of one side}$

and the volume, is the area of the triangle, times the length, so, whatever you get for the area of the triangle * 10