Question

Perth located on ${118}^{\circ }$ East Longitude will be celebrating New Year event on $1st$ of January $2017$ at $6:00$ AM. At that time, what would be the time at Los Angeles located on ${110}^{\circ }$ West Longitude?

• A. $9:12PM$ of $1st$ January $2017$
• B. $2:48PM$ of $31st$ December $2016$
• C. $11:40PM$ of $31st$ December $2016$
• D. $5:28AM$ of $1st$ January $2017$

Answer 1

The correct option is B $2:48PM$ of $31st$ December $2016$

Difference in longitude of Perth and Los Angeles $={110}^{\circ }-(-{118}^{\circ })={228}^{\circ }$

Total time difference due to ${228}^{\circ }$ longitude $=4\times 228=912$ minutes$=15$ hours $12$ minutes

Time at Los Angeles will be before $15$ hours $12$ minutes than Perth.

Time at Los Angeles will be $2:48$ PM of ${31}^{st}$ December $2016.$