1.

A ladder 9 m long reaches a point 9 m below the top of a vertical flagstaff. From the foot of the ladder, the elevation of the flagstaff is 60°. What is the height of the flagstaff?

A. 9 m
B. 10.5 m
C. 13.5 m
D. 15 m
Answer» D. 15 m


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