A body is projected upward at an angle of 30 degrees with the horizontal and has an initial speed 

A body is projected upward at an angle of 30 degrees with the horizontal and has an initial speed of 90 m/s.
(i) In how many seconds will it reach the ground?
(ii) How far from the point of projection will it strike the ground?
(iii) At what angle with the horizontal will it strike the ground?