1.

From the top of a 20 metre high building, the angle of elevation of the top of a tower is 60 and the angle of depression of its foot is at 45 , then the height of the tower is ( 3 = 1.732)

A. 45.46 metre
B. 45.64 metre
C. 54.64 metre
D. 54.46 metre
Answer» D. 54.46 metre


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