1. Two vertical poles are 200 m apart and the height of
one is double that of the other. From the middle point of the line joining
their feet, an observer finds the angular elevations of their tops to be
complementary. Find the heights of the poles.
A.
141 m and 282 m
B.
70.5 m and 141 m
C.
65 m and 130 m
D.
130 m and 260 m
2. Two ships are sailing in the sea on the two
sides of a lighthouse. The angle of elevation of the top of the lighthouse is
observed from the ships are 30° and 45° respectively. If the lighthouse is 100
m high, the distance between the two ships is:
|
A.
|
173
m
|
|
B.
|
200
m
|
|
C.
|
273
m
|
|
D.
|
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