Two towers on top of two hills are `40 km` apart. The line joining them passes `50 m` above a hill halfway between the towers. What is the longest wavelength of radio waves, which can be sent between the towers without appreciable diffraction effects ?

Two poles are 10 m and 20 m high. The line joining their tops makes an angle of 15^(@) with the horizontal. What is the approximate distance between the poles?

There are two towers of 5m&10m. The line joning there tops makes 15^(@) with ground then find the distance between them

Two towers stand on a horizontal plane. P and Q where PQ = 30 m, are two points on the line joining their feet. As seen from P the angle of elevation of the tops of the towers are 30 and 60 but as seen from Q are 60 and 45. The distance between the towers is equal to

Two men are on the opposite sides of a tower. They measure the angles of elevation of the top of the tower as 45^(@) and 30^(@) respectively. If the height of the tower is 40 m, then the distance between the men is

Two men on either side of a tower 75 m high observe the angle of elevation of the top of the tower to be 30° and 60°. What is the distance between the two men ?

The angle of elevation of the top of a tower 30 m high from the foot of another tower in the same plane is 60^@ and the angle of elevation of the top iof the second tower from the foot of the first tower is 30^@ . The distance between the two towers isntimes the height of the shorter tower. What is nequal to?