If the longitude of a place A is 124°12' East, determine the standard time when the local time at A is 4:33 PM.
Answers
Given : longitude of a place A is 124°12' East, Local time at A is 4:33 PM.
To Find : determine the standard time
Solution:
360 deg longitude = 24 hours
=> 1 deg longitude = 24 / 360 hr = 1/15 hr = 4 mins
Prime meridian follows GMT is at 0 deg longitude
East is ahead of GMT & West lags GMT
124°12' East = 124°12' x 4 mins
= 124 x 4 + (12/60) * 4
= 496 + 0.8
= 496 mins 48 sec
= 8 hr 16 min 48 sec
local time at A is 4:33 PM
Hence Standard time ( GMT time )
= 4:33 PM - 8 hr 16 min 48 sec
= 8 : 16 : 12 AM
8 hr 16 min 12 sec AM
standard time when the local time at A is 4:33 PM. = 8 : 16 : 12 AM
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