A body is projected from the ground with a velocity at an angle of \[30{}^\circ \]. It crosses a wall after 3 sec. How far beyond the wall the stone will strike the ground? [Take \[\text{g =10 m/}{{\text{s}}^{\text{2}}}\]]

• A. 50\[\sqrt{2}\]    
• B.        70\[\sqrt{2}\]
• C. 15\[\sqrt{3}\]    
• D.        16\[\sqrt{2}\]