When observed from the top of a 125 m high building,the angle of depression of a car was found to be `30^@`.Find the distance of the car from the building.

A straight highway leads to the foot of a tower.A man standing at the top of the tower observed a car at an angle of depression of 30^@ ,which 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.

A man standing on the deck of a ship which is 10 m above the water level, observes the angle of elevation of the top of a hill as 60° and angle of depression of the base of a hill as 30°. Calculate the distance of the hill from the ship and the height of the hill.

As observed from the top of a 75 m high lighthouse from the sea-level,the angles of depression of two ships are 30^@ and 45^@ .If one ship is exactly behind the other on the same side of the lighthouse,find the distance between the two ships.

When observed from a point on the horizontal line passing through the base point of a vertical tower the angle of elevation of the highest point of the tower was found to be 30^@ .If the distance from the tower to the point of observation is 200m,find the height of the tower.

From the top of a 7 m high building ,the angle of elevation of the top of a cable tower is 60^@ and the angle of depression of its foot is 45^@ .Determine the height of the tower.

A 1.5 m tall boy is standing at some distance from a 30 m tall building.The angle of elevation from his eyes to the top of the building increases from 30^@ to 60^@ as he walks towards the building.Find the distance he walked to towards the building.

As observed from the top of a light house, 100m high above sea level, the angle of depression of a ship sailing directly towards it, changing from 30° to 60°.Determine the distance travelled by the ship during the period.

A boy standing on a horizontal plane find a bird flying at a distance of 100m from him at an elevation of 30°. A girls standing on the roof of 20 m high building finds the angle of elevation of the same bird to be 45°.Both the boy and the girl are on opposite sides of the bird.Find the distance of the bird from the girl.

The angle of elevation of a post of height 55m as seen from the foot of a man standing on a road is 60^@ .Find the distance of the man from the post.

From the top of a building 100m high ,the angle of depression of the top and bottom of a tower observed to be 45° and 60° respectively. Find the height of the tower. Also find the distance between the foot of the building.