What is the longitude of a town if its local time is 6 P.M. when Greenwich time is 4 P.M.?
A
20oE
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B
30oE
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C
20oW
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D
30oW
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Solution
The correct option is B 30oE A difference of 4 minutes is given by 1o longitude. So, a difference of 2 hours(120 minutes) is given by 30o longitude Since the time of the town is ahead of GMT. so it lies to the east of Greenwich.