A particle is projected up with a velocity of $v_0=10\mathrm{m}/\mathrm{s}$ at an angle of ${\theta }_0={60}^{\circ }$ with horizontal onto an inclined plane. The angle of inclination of the plane is 30^o. The
time of flight of the particle till it strikes the plane is (take $g=10\mathrm{m}/{\mathrm{s}}^2$)

• A

  $1\mathrm{s}$

• B

  $1/2\mathrm{s}$

• C

  $\frac{2}{\sqrt{3}}\mathrm{s}$

• D

  $\frac{1}{2\sqrt{3}}\mathrm{s}$