question_answer

                         Why is it necessary to have standard time? Also define Indian Standard Time (IST).                                           

Answer:

  

(a) It is necessary to have a standard time because:

(i) Different meridians have different time, which makes it difficult to prepare a time table for trains and flights.

(ii) It helps to maintain uniformity of time throughout the country.

(b) Indian Standard Time: In India, the longitude of \[82{}^\circ 30'E\] is treated as the standard meridian and the local time at this meridian is taken as the standard time for the whole country. It is known as Indian Standard Time (1ST).