A) ?\[{{17}^{o}}{{30}^{o}}E\]
B) ?\[{{7}^{o}}{{30}^{o}}W\]
C) ?\[{{172}^{o}}{{30}^{o}}E\]
D) \[{{90}^{o}}W\]
Correct Answer: B
Solution :
?When it is noon i.e. 12.00 at 1ST (Indian Standard Time), the local time at another place is 6 AM. Thus the difference of time between these two places is 6 hours. Since difference of \[{{1}^{o}}\] longitude makes a difference of 4 minutes in local time, difference of 6 hours makes a difference of \[{{90}^{o}}\] longitude. I.S.T. is based upon \[{{82}^{o}}{{30}^{o}}\] east longitude so the place will be \[{{90}^{o}}\] west of 1ST. Therefore the place is located at\[{{90}^{o}}-{{82}^{o}}{{30}^{o}}={{7}^{o}}{{30}^{o}}\]west.
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