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A vector is represented by $3 \hat{i} + \hat{j} + 2 \hat{k}$ . Its length in XY-plane is

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Correct option is C

In XY-plane, vector is 3i^+j^∴ Length in XY-plane =9+1=10

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A vector is represented by 3i^+j^+2k^ . Its length in XY-plane is

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A vector is represented by $3 \hat{i} + \hat{j} + 2 \hat{k}$ . Its length in XY-plane is