From the kip of a storey-buliding, the angle of depression of a mango on a tree 20 m away from the base of the storey-building is 68°. if the mango is 4.5 m above the ground, what is the height of the storey-building to the nearest metre?
55m
54m
50m
49m
45m
Correct answer is B
No explanation has been provided for this answer.