Answer: 1 Hour 45 Minutes
Notes: In India, the longitude of 82½° E (82° 30'E) is treated as the standard meridian. The local time at this meridian is taken as the standard time for the whole country. It is known as the Indian Standard Time (IST). The local time of places which are on different meridians are bound to differ. For example, it will be difficult to prepare a time-table for trains which cross several longitudes. In India, for instance, there is a difference of about 1 hour and 45 minutes in the local time of Dwarka in Gujarat and Dibrugarh in Assam.
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