Positions of two vehicles \( \mathrm{A} \) and \( \mathrm{B} \) with reference to origin \( \mat...

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Positions of two vehicles \( \mathrm{A} \) and \( \mathrm{B} \) with reference to origin \( \mathrm{O} \) and their velocities are as shown.
(A) they will collide
\( \left(\mathrm{B}^{*}\right) \) distance of closest approach is \( 100 \mathrm{~m} \).
\( \left(C^{*}\right) \) their relative speed is \( \frac{40}{\sqrt{3}} \mathrm{~m} / \mathrm{s} \)
(D) their relative velocity is \( \frac{20}{\sqrt{3}} \mathrm{~m} / \mathrm{s} \)
\( P \)
W.
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