A particle is projected with a velocity of \( 20 \mathrm{~m} / \mathrm{s} \) at \( \mathrm{P} \)...

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A particle is projected with a velocity of \( 20 \mathrm{~m} / \mathrm{s} \) at
\( \mathrm{P} \) angle of \( 30^{\circ} \) to an inclined plane of inclination \( 30^{\circ} \) to the horizontal. The particle hits the inclined plane at
W an angle \( 30^{\circ} \), during its journey. The time of flight is
(1) \( \frac{4}{\sqrt{3}} \)
(2) \( \frac{2}{\sqrt{3}} \)
(3) \( \sqrt{3} \)
(4) \( \frac{\sqrt{3}}{2} \)
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