Two particles $A$ and $B$ start moving with velocities $20 \,m / s$ and $30 \sqrt{2} \,m / s$ along $x$-axis and at an angle $45^{\circ}$ with $x$-axis respectively in $x y$-plane from origin. The relative velocity of $B$ w.r.t. $A$ is ........... $m / s$
Two particles $A$ and $B$ start moving with velocities $20 \,m / s$ and $30 \sqrt{2} \,m / s$ along $x$-axis and at an angle $45^{\circ}$ with $x$-axis respectively in $x y$-plane from origin. The relative velocity of $B$ w.r.t. $A$ is ........... $m / s$
- A
$(10 \hat{i}+30 \hat{j})$
- B
$(30 \hat{i}+10 \hat{j})$
- C
$(30 \hat{i}-20 \sqrt{2} \hat{j})$
- D
$(30 \sqrt{2} \hat{i}+10 \sqrt{2} \hat{j})$
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