8. Time Calculation Formula
• 1 degree differ 4 minutes time difference
• 1 minutes differs 4 second time difference
• Towards east time increase and towards west
• time decrease.
• If 0 degree 12’0 noon then in 82 degree (82 × 4) = 328
minutes
• 328 minutes means (328÷60) = 5 hours 28 minutes
• 30’ means (30 × 4) =120 second = 2 minutes
• So, 5 hours 28 minutes + 2 minutes = 5 hours 30 minutes
• As India is situated towards east from prime meridian
• Indian time will be GMT + 5 hours 30 minutes
London GMT
India IST
+ 5:30