1.

Let bara=2bari+barj-2bark,barb=bari+barj. If barc is a vector such that bara.barc=abs(barc),abs(barc-bara)=2sqrt2 and the angle between (baraxxbarb) and barc is 30^(@), then abs((baraxxbarb)xxbarc)=

Answer»

`2/3`
`3/2`
2
3

Answer :B


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