Locating Places on the Earth — Social Studies STD 6 — Question

• Both local time and standard time are based on meridiAnswer :
• Local.time is based on the local meridian passing through that place. The places lying North and South on the same meridian will have the same local time. On the other hand the places lying East or West of that meridian will have different local times. It varies by 4 minutes for every 1° of Prime meridian East or West. While in the East it is plus 4 minutes going West from Prime Meridian it is 4º behind. (If it is 12 noon at Greenwich it would be 12.04 pm in the 1° East and 11.56 a.m. in the 1° west).
• Standard time is local time of a meridian of longitude which is considered valid for the whole country. This meridian is called Standard Meridian of the country. Example in Indian Standard Meridian is 82 ½°E and time on it is Indian Standard Time (1ST)