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-- Mathematics - Section B1
Vectors
The value of $\lambda$ when the projection of $\vec{a}=\lambda \hat{i}+\hat{j}+2 \sqrt{5} \hat{k}$ on $\vec{b}=2 \hat{i}+4 \hat{j}+\sqrt{5} \hat{k}$ is 6, is:
4
6
10
8
The correct answer is Option (4) → 8