Just a no-booktabs
sketch, to reproduce your table as similar as possible. Using booktabs
is of course recommended for a readability concept that holds everywhere but the first sight on the table would then change very much.
\documentclass{article}
\usepackage{multirow}
\begin{document}
Text
\begin{table}[ht]
{\sffamily%
\begin{tabular}{*{7}{c|}}
% be careful when nesting \multicolumn and \multirow
\cline{2-7}
\multirow{2}{*}{ } & \multicolumn{4}{|c|}{Area [$m^2$]} & \multicolumn{2}{c|}{\multirow{2}{*}{\shortstack[c]{Volumen Semiesf\'erico\\ truncado [$m^3$]}}}\\
\cline{2-5}
& \multicolumn{2}{c|}{Circular} & \multicolumn{2}{c|}{El\'{\i}ptica} & \multicolumn{1}{c}{} & \\
% second part below is standard
\hline
\multicolumn{1}{|c|}{Tipo RA} & Rango & Promedio & Rango & Promedio & Rango & Promedio\\
\hline
\multicolumn{1}{|c|}{ALTA} & 2 - 2 & 3 & 4 - 4 & 5 & 6 - 6 & 7\\
\hline
\multicolumn{1}{|c|}{MEDIA} & 2 - 2 & 3 & 4 - 4 & 5 & 6 - 6 & 7\\
\hline
\multicolumn{1}{|c|}{BAJA} & 2 - 2 & 3 & 4 - 4 & 5 & 6 - 6 & 7\\
\hline
\end{tabular}
}%
\end{table}
Text.
\end{document}
The output of this code is:

Alignments, line breaks and spacing may be considerably improved, also depending on your time and objectives.