1.

The volume (in cubic unit ) of the tetrahedron with edges hati+hatj+hatk, hati-hatj+hatk and hati+2hatj-hatk, is

Answer»

4
`(2)/(3)`
`(1)/(6)`
`(1)/(3)`

Solution :Volume of TETRAHEDRON `=1/6[(AB, AC, AD)]`
`=1/6 |(1,1,1),(1,-1,1),(1,2,-1)|`
`=1/6 [-1+2+3]=2/3` cu UNIT


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