\[a = 15\ см;\ \ b = 24\ см;\ \ \]
\[c = 18\ см.\]
\[S = 2 \cdot (ab + bc + ac) =\]
\[= 2 \cdot (15 \cdot 24 + 24 \cdot 18 + 15 \cdot 18) =\]
\[2 \cdot (360 + 432 + 270) =\]
\[= 2 \cdot 1062 = 2124\ см^{2}.\]
\[Ответ:2124\ см^{2}.\]