Question

The value of $\lambda$, for which the projection of $\vec{a} = \lambda \hat{i} + \hat{j} +4 \hat{k}$ on $\vec{b} =2\hat{i} +6 \hat{j} +3\hat{k}$ is 4 units

• A. 8
• B. 10
• C. 11
• D. 5

Answer 1

Answer: (D)

5

Answer 2

The correct option is (D): 5