A guard observes an enemy boat, from an observation tower at a height of 200m above sea level to be an angle of depression of `30^(@)`.
If the boat is 200m from the observation tower, then what is the angle of depression.

A boat is moving away from an observation tower .It makes an angle of depression of 30^(@) with an observer 's eye when at a distance of 50 metre from the tower . After 8 seconds ,the angle of depression becomes 60^(@) .By as - suming that it is running in still water , the approximate speed of the boat is :

From the top of a lighthouse 120 m above the sea, the angle of depression of a boat is 15^(@). what is the distance of the boat from the lighthouse?

From the top of a lighthouse 120m above the sea, the angle of depression of a boat is 15^(@) . What is the distance of the boat from the lighthouse?

From the top of a lighthouse 70 m high with its base at sea level, the angle of depression of a boat is 15^(@) . The distance of the boat from the foot of the lighthouse is :

From the top of a lighthouse 70 m high with its base at sea level, the angle of depression of a boat is 15^(@). The distance of the boat from the foot of the lighthouse is

From the top of a light house 60m high with itsbase at sea level the angle of depression of a boatis 15^(@). The distance of the boat from the light house is

A man is watching from the top of a tower a boat speeding away from the tower. The boat makes an angle of depression of 45° with the man's eye when at a distance of 60 m from the bottom of tower. After 5 seconds, the angle of depression becomes 30°. What is the approximate speed of the boat assuming that it is running in still water ?

The angle of depression of a point situated at a distance of 70 m from the base of a tower is 60^(@) .The height of the tower is :