Mathematics
Two boats approach a lighthouse in mid-sea from opposite directions. The angles of elevation of the top of the lighthouse from the two boats are 30° and 45° respectively. If the distance between the two boats is 100 m, the height of the lighthouse is:
36.6 m
68.3 m
73.2 m
136.6 m
Related Questions
The angles of elevation of the top of a tower, 40 m high, from two points on the level ground on its opposite sides are 45° and 60°. The distance between the two points in nearest metres is :
60 m
61 m
62 m
63 m
The angles of elevation of the top of a tower from two points distant 30 m and 40 m on either side from the base and in the same straight line with it are complementary. The height of the tower is :
11.54 m
23.09 m
34.64 m
69.28 m