Volume of the parallelopiped with its edges represented by the vectors $\hat i+\hat j, \hat i+2\hat j$ and $\hat i+\hat j+π\hat k$, is

$π$ $π/2$ $π/3$ $π/4$

$π$

Volume of the given parallelopiped is the absolute value of the determinant $D=\begin{vmatrix}1&1&0\\1&2&0\\1&1&π\end{vmatrix}=π$ ∴ Volume = $π$