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A particle moves in a circle from A to \( \mathrm{C} \) through B with an average velocity of magnitude
\( P \) \( 10 \mathrm{~ms}^{-1} \) and from \( \mathrm{C} \) to \( \mathrm{D} \) with an average velocity W of magnitude \( 5 \mathrm{~ms}^{-1} \). The magnitude of average velocity of the particle for the path \( \mathrm{ABCD} \) is
(1) \( \frac{2 \sqrt{3}}{5} \mathrm{~ms}^{-1} \)
(2) \( 7.5 \mathrm{~ms}^{-1} \)
(3) \( \frac{6 \sqrt{3}}{\pi} \mathrm{ms}^{-1} \)
(4) \( \frac{5 \sqrt{3}}{2} \mathrm{~ms}^{-1} \)
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