\[\boxed{\mathbf{4.180}}\]
Пояснение.
Решение.
\[\textbf{а)}\ a = 4\ м;b = 3\ м;c = 15\ м:\]
\[V = 4 \cdot 3 \cdot 15 = 60 \cdot 3 =\]
\[= 180\ \left( м^{3} \right).\]
\[\textbf{б)}\ V = 3094\ см^{3};b = 13\ см;\]
\[a = 17\ см:\]
\[13 \cdot 17 \cdot c = 3094\]
\[221c = 3094\]
\[c = 3094\ :221\]
\[c = 14\ см.\]
\[\textbf{в)}\ V = 13\ 600\ см^{3};\ \ a = 25\ см;\ \ \]
\[c = 34\ см:\]
\[25 \cdot 34 \cdot b = 13\ 600\]
\[850b = 13600\]
\[b = 13\ 600\ :850 = 1360\ :85\]
\[b = 16\ см.\]
\[\textbf{г)}\ V = 1206\ дм^{3} =\]
\[= 1\ 206\ 000\ см^{3};\ \ a = 18\ см:\]
\[18cb = 1\ 206\ 000\ \]
\[cb = 1\ 206\ 000\ :18\]
\[cb = 67\ 000\ см^{2} = 670\ \left( дм^{2} \right) -\]
\[площадь\ передней\ грани.\]