Question

New Orleans is located at 90degree west and Patna is located at 90 degree east longitude. When it is 12noon at Greenwich, calculate the calculate the local time of New Orleans and Patna. ​

Answer 1

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every 1° is equal to 4 minutes.

If it is on west of greenwich median than substract the calculated time from actual time of GMT and if it is on east than add.

74°W = 74×4 = 296 minutes i.e 4 hours 56 minutes.

time on greewich is 12:00 . so, time on 69°E is

12 - 4 hr 56 min = 7:04

similarly in case of 105°E we have to add the time i.e

105 ×4min = 420 min i.e 7 hours

12 +7 hrs = 19:00

and for 120°W again

120×4 min = 480 min i.e 8 hours

12- 8 hours = 04:00

P.S

Time I have followed is military time i.e 24 hours clock.

East or west of longitudes measures from 0° i.e greenwich median line.