(12) From a point on the roof of a house, 11m high, it is observed that the angles of depression of the top and foot of a lamp ost are `30^@` and `60^@` respectively. What is the height of the lamp post?

From the top of a building 60m high the angles of depression of the top and the bottom of a tower are observed to be 30^0 and 60^0 . Find the height of the tower.

A ship of height 24 m is sighted from a lighthouse. From the top of the lighthouse the angle of depression to the top of the mast and base of the ship is 30^@ and 45^@ respectively. How far is the ship from the lighthouse ? ( sqrt3 = 1.73 )

(11) A ship of height 24m is sighted from a lighthouse. From the top of the lighthouse, the angle of depression to the top of the mast and base of the ship is 30^@ and 45^@ respectively. How far is the ship from the lighthouse? (sqrt3 = 1.73)

(10) A straight road leads to the foot of a tower of height 50m. From the top of the tower, the angle of depression of two cars standing on the road are 30^@ and 60^@ . What is the distance between the two cars?

A pilot in an aeroplane observes that Vashi bridge is one side of the plane and Worli sea - link is just on the oposite side . The angles of depressions of Vashi bridge and Wrli sea - link are 60^(@) and 30^(@) respectively . If the aeroplane is at a height of 5500 sqrt(3)m at that time, what is the distance between Vashi bridge and Wrli sea - link ?

From the top of a light house, 80 metres high, two ships on the same side of light house are observed. The angles of depression of the ships as seen from the light house are found to be of 45^@ and 30^@ . Find the distance between the two ships. (Assume that the two ships and the bottom of the lighthouse are in a line)

Two buildings are facing each other on either side of a road of width 12m. From the top of the first building, which is 10 m high, the angle of elevation of the top of the second is 60^@ . What is the height of the second building?

Two buildings are facing each other on either side of a road of width 12m. Form the top of the first building , which is 10m. High, the angle of elevation of the top of the second is 60^@ . What is the height of the second building?

A person standing on the bank of a river observes that the angle of elevation of the top of a tree standing on the opposite bank is 60^(@) . When he moves 40 m away from the bank, he finds the angle of elevation to be 30^(@) . Find the height of the tree and the width of the river. (sqrt3=1.73)

A boy is at a distance of 60 m from a tree, makes an angle of elevation of 60^@ with the top of the tree. What is the height of the tree?