1.

Area of a rectangle having vertices A,B,C and D with positions vectors - hat i +1/2 hat j + 4 hat k, hat i + 1/2 hat j + 4 hat k, hat i - 1/2 hat j + 4 hat k and - hat i - 1/2 hat j + 4 hat k, respectively is

Answer»

`(1)/(2)`
1
2
4

Answer :C


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