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Find the volume of a parallelopiped whos...

Find the volume of a parallelopiped whose coterminus edges are represented by the vector `hat(j) + hat(k).hat(i) + hat(k)` and `hat(i) + hat(j)`. Also find volume of tetrahedron having these coterminous edges.

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The correct Answer is:
2 cubic units, `(1)/(3)`, cubic units
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