An information signal of 150 MHz to be sent across a distance of 40 km. Which mode of communication is suitable?

How much time is taken by an information to pass from one place to another at a distance of 60 km in space communication ?

How much time is taken by an information to pass from one place to another at a distance of 60 km in space communication ?

A transmitting antenna of height h and the receiving antenna of height 45 m are separated by a distance of 40 km of satisfactory communication in line of sight mode. Then the value of h is (given radius of earth is 6400 km)

A transmitting antenna of height 20 m and the receiving antenna of height h are separated by a distance of 40km for satisfactory communication in line of sight mode. Then the value of h is

A transmitting antenna of height 20 m and the receiving antenna of height h are separated by a distance of 40km for satisfactory communication in line of sight mode. Then the value of h is

A transmitting antenna of height 20 m and the receiving antenna of height h are separated by a distance of 40km for satisfactory communication in line of sight mode. Then the value of h is

A transmitting antenna of height 20 m and the receiving antenna of height h are separated by a distance of 40km for satisfactory communication in line of sight mode. Then the value of h is

A transmitting antenna of height 20 m and the receiving antenna of height h are separated by a distance of 40 km for satisfactory communication in line of sight (Los) mode. Then the value of his (Give, radius of earth is 6400 km.