A Stone Is Thrown at an Angle of 30° Above

Multiple Choice

A stone is thrown at an angle of 30° above the horizontal from the top edge of a cliff with an initial speed of 11.1 m/s.A stop watch measures the stone's trajectory time from top of cliff to bottom to be 5.5 s.What is the height of the cliff? (g = 9.8 m/s² and air resistance is negligible)
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A) 179 m
B) 148 m
C) 118 m
D) 31 m
E) 137 m