The torque due to the force (2 i + j +2 k ) about the origin, acting on a particle whose position vector is ( i + j + k ), would be

The torque due to the force $\displaystyle (2 \hat{i}+\hat{j}+2 \hat{k})$ about the origin, acting on a particle whose position vector is $\displaystyle (\hat{i}+\hat{j}+\hat{k})$, would be