!!PROJECTILE!!

Classical Mechanics Level pending

A particle is thrown is thrown at $$t=0$$, with a velocity of $$10 m/s$$ at an angle of $$60degree$$ with the horizontal , from a point on an incline plane , making an angle of $$30 degree$$ with the horizontal. The time when the velocity of the projectile becomes parallel to the incline is (g=10) :-

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