Question

calculate the time at X 145°east when it is 6:30 am at Y 30°east

Answer 1

the longitudinal difference between the places=145-30=115
1 degree longitude makes time difference of 4 min
so 115 degree will make difference of 115×4=460 min
or 460 min=1/60×460=23/3hr
=7whole2/3 hr
so the place x is in the east so the time difference should be added.
the time of place x=6hr+30min+7hr+40min
13hr+60mn
14hr
2:00pm