Question

Calculate​ the location of a place where the local time7:30pm at Greenwich

Answer 1

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

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