Calculate the location of a place where the local time is noon when it

1.	Calculate the location of a place where the local time is noon when it is 7.30 p.m. at Greenwich.
Answer» Time difference is 12 – 7.30 = 4.30 or 4 hours 30 minutes = 240 + 30 = 270 minutes So the longitudinal difference is 270/4 = 67.5°. So the longitude is 67.5°W or 67 1/2° W.

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