Q.

Let a=2i^-j^-k^, b=i^+3j^-k^ and c=2i^+j^+3k^. Let v be the vector in the plane of the vectors a and b, such that the length of its projection on the vector c is 114. Then |v| is equal to            [2026]

1 212  
2 352  
3 13  
4 7  

Ans.

(2)