The velocity of a car A is $5\hat{\mathrm{i}}$. The velocity of another car B is $22\widehat{\mathrm{i}}–7\widehat{\mathrm{j}}$ . What is the relative velocity of A with respect to B?

The formula for calculating relative velocity of a body with respect to another body is- relative velocity = Velocity vector of A – Velocity vector of B. Hence, here, the relative velocity = velocity of B – velocity of  A= $-17\widehat{\mathrm{i}}+7\widehat{\mathrm{j}}.$