5.5 * 15 = 82.5
82.5° east longitude
The need for the Indian Standard Meridian was to establish a common reference point for time determination in India. By adopting the 82.5° E longitude as the standard meridian, it helped in organizing the country into a single time zone, simplifying time-keeping and communication processes across the nation.
The standard meridian time for Europe is Greenwich Mean Time (GMT)
The significance of standard meridian of India is that Standard meridian is used as the standard time for whole country. If it isn't there chaos will be created in the country so standard time is very important.
The standard meridian is taken as 82'30 Degrees. It is taken because it passes near Allahabad whicf lies almost at the center of the country.
India Standard Time is five and a half hours ahead of Greenwich Mean Time.
IST PASSES THROUGH ALLAHABAD (UTTAR PRADESH)
The standard meridian of Malaysia is 105. Malaysia abides by the Malaysia Standard Time, which is developed in December 31, 1981 between WWI and WWII.
The Pacific Standard Time Zone should be centered around 120° west longitude.
Indian Standard Time is calculated with a time offset of UTC + 5:30. If it is midnight UTC, then it will be 5:30am IST (Indian Standard Time). Indian Standard Time also covers Sri Lanka and the islands of Lakshadweep.
There is no standard meridian for Pakistan, if you are referring to the standard time zone it is 5+ or 6+ hours, depending on the time of year
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