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The magnitude of the projection of the vector k ˆ j ˆ 3 i ˆ 2 + + on the vector perpendicular to the plane containing the vectors k ˆ j ˆ i ˆ + + and k ˆ 3 j ˆ 2 i ˆ + + , is -

1. 2 3
2. 2 3
3. 6 3
4. 6

Correct answer: 2 3

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