A man standing on a railway overbirdge of `5sqrt3` m height observed the engine of the train from one side of the bridge at an angle of depression of `30^@`. But just after 2 seconds, he observed the engine at an angle of depression of `45^@` from the other side of the bridge. Find the speed of the train.

Laxmidevi standing on a railway overbridge of 5sqrt(3) metres height observed the engine of the train from one side of the bridge of depression of 30^(@) . But just after 2 seconds, she observed the engine at an angle of depression of 45^(@) from the other side of the bridge. Find the speed of the train in metres per second.

A man standing on a railway bridge 5sqrt3 meters high, observes the engine of a train at an angle of depression 30^@ . But after 2 seconds, he observes the engine at an angle of depression 45^@ on the other side of the bridge. Find the speed of the train.

From the top of a building, the angle of elevation of the top of a cell tower is 60^(@) and the angle of depression to its foot is 45^(@) . If distance of the building from the tower is 7m, then find the height ofthe tower.

Find the angle of depression of a boat from the bridge at a horizontal distance of 25 m from the bridge, if the height of the bridge is 25sqrt3 m____

From the point on the top of a palace of 60 metres height, it is observed that the angle of depression of the tip and the foot of a tower are 30^@ and 60^@ respectively. Find the height of the tower.

A man standing in the midst of a field observes, a flying bird in his north at an angle of elevation of 30^@ and after 2.5 minutes he observes the bird in his south at an angle of elevation of 60^@ . If the bird flies in a straight line all along at a height of 60sqrt3 metres, what is its speed?

Narayan, standing in the midst of a field, observes a flying bird in his north at an angle of elevation of 30^@ and aft er 21 minutes he observes the bird in his south at an angle of elevation of 60^@ . If the bird flies in a s traight line all a height of 50sqrt3 metres, then find its speed in metre per minuts.

Rajender observes a person standing on the ground from a helicopter at an angle of depression 45^(@) . If the helicopter flies at a height of 500 meters from the ground, what is the distance of the person from Rajender?

Monu standing in the midst of a field, observes a flying bird in his north at an angle of elevation of 30^(@) and after 2 minutes he observer the bird in his south at an angle of elevation of 60^(@) . If the bird flies in a straight line all along at a height of 50sqrt(3) metres, find its speed in kilometre per hour.

The angle of elevation of a cloud from a point 200 m above a lake is 30^@ and the angle of depression of its reflection in the lake is 45^@ . Find the height of the cloud from the lake.