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The volume (in cubic units) of the tetrahedron with edges $\hat i+\hat j+\hat k, \hat i - \hat j+\hat k$ and $\hat i+2 \hat j-\hat k$ is

$\begin {array} {1 1} (a)\;4 & \quad (b)\;2/3 \\ (c)\;1/6 & \quad (d)\;1/3 \end {array}$

Can you answer this question?

$(b)\;\large\frac{2}{3}$
answered Nov 7, 2013 by
edited Jan 20, 2014 by meena.p