why do we consider greenwich time while calculating time for various places in the world

As some parts of the world face the Sun and some don't at a given time, the places have different time. So, we needed a standard way to relate them so that there is no confusion among countries. The Greenwich meridian line passes through the town of Greenwich in London and based on how many degrees a given place is east or west from the meridian, the place's time is calculated. The place that will be 180 degrees faraway i.e. the opposite side of the world from a place will have 12 hours difference in time. For e.g. if it is 12 noon in India then it is 12 midnight in some parts of USA and Canada. Hope it helps. Thank you.

  • 3
because the Greenwich time is the prime meridian. it is the common time for the whole world. thus it is very important and that is why we consider it while calculating the time for various places in the world.
  • 1
it is the reffrence type 
  • 3
Unlike parallel of latitude , all meridians are of equal length . Thus it was difficult to number the Meridian. Hence , all countries decided that the count should begin from the Meridian which passed through Greenwich , where the British royal observatory is located . This Meridian is called the Prime Meridian . Its value is 0 degree longitude and from it we count 180 degree eastward as well as 180 degree Westward . The Prime Meridian and 180 degree Meridian divides the earth into two equal halves , the Eastern hemisphere and the Western hemisphere . Therefore the longitude of a place is followed by the letter E for the east and W for the West . It is , however , interesting to note that 180 degree east and 180 degree West meridians are on the same line .
  • 2
Hist ch 2 questions answer
  • 2
the circle passing through greenwhich in britain and perpendicular to the equator and parallel to the axis is the prime meridian. it divide sthe earth into 2 hemisphres.the eastern and western togeher the meridian and the equator divide earth into 4 equal parts the longitudes are measured in degrees
  • 2
What are you looking for?