Why did Darius build persepolis in the location he did ?

Explanation:Darius commissioned Persepolis to be built far from the old capital of Pasargadae & equally remote from established administrative centers. The problem with the transition was that there was already a sitting king in place –Bardiya, brother of Cambyses II who took control while Cambyses II was campaigning in Egypt.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: