A force \( \mathbf{F}=5 \hat{\mathbf{i}}+6 \hat{\mathbf{j}}-4 \hat{\mathbf{k}} \) acting on a bo...

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A force \( \mathbf{F}=5 \hat{\mathbf{i}}+6 \hat{\mathbf{j}}-4 \hat{\mathbf{k}} \) acting on a body produces a displacement \( \mathbf{d}=6 \hat{\mathbf{i}}+5 \hat{\mathbf{k}} \). The work done by the force is
(a) 18 units
(b) 15 units
(c) 12 units
(d) 10 units
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