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The volume of the tetrahedron ABCD with vertices A(x1, y1, z1), B(x2, y2, z2), C(x3, y3, z3) and D(x4, y4, z4) is

V = (1/6)|((x1,y1,z1,1),(x2,y2,z2,1),(x3,y3,z3,1),(x4,y4,z4,1))|

The volume of a tetrahedron with vertices (0, 0, 0), (2, 0, 0), (0, 3, 0) and (0, 0, 4) is

(a) 1 

(b) 4 

(c) 6 

(d) 2

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Answer is (b) 4

Volume of a tetrahedron

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