From the top of a rock `50sqr(3)` m high, the angle of depression of car on the ground is observed to be `30^(@)`. Find the distance of the car from the rock.

The angle of depression of a boast from 50sqrt(3) high bridge is 30^(@) . The horizontal distance of the boat from the bridge is ___.

From the top of a lighhouse, the angles of depression of two ships on the opposite sides of it are observed to be 30^(@) and 60^(@) . If the height of the lighthouse is h meters and thhe line joining the ships passes through the foot of the lighthouse. show that the distance between the ships is (4h)/(sqrt(3)) m.

From the top of a tower the angle of depression of a point on the ground is 60^@ if the distance of this point to tower is (1)/( sqrt(3) +1) metres , then the height of the tower is

A straight highway leads to the foot of tower. Ramaiah standing at the top of the tower observes a car at an angle of depression 30^(@) . The car is approaching the foot of the tower with a uniform speed. Six seconds later, the angle of depression of the car is found to be 60^(@) . Find the time taken by the car to reach the foot of the tower from this point.

An observer on the top of a tree ,finds the angle of depression of a car moving towards the tree to be 30^@ .After 3 minutes this angle becomes 60 ^@ .After how much more time , the car will reach the tree ?

From te top of a tower , 60 meters high, the angles of depression of the top and bottom of a pole are alpha and beta respectively .Find the height of the pole.