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?
-
A.
55m -
B.
54m -
C.
50m -
D.
49m -
E.
45m