Question

why every country has to choose a standard meridian for the whole of the country??
Give answer in one word??​

Answer 1

Answer: The local time of the standard meridian is taken as the local time for the whole country. This concept of standard time for the whole country is needed because time varies with change in longitudes. If all places on different meridians follow their own local time, there would be confusion and chaos.

Answer 2

Answer:

since, many meridians pass through it, it is important to adopt the local time of one central meridian of country as the standard time for the country thus ,we need a standard meridian for the country