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solve THE PROBLEM? WHEN IT IS 12 NOON ON SUNDAY AT GREENWICH [ 0 DEGREE ] WHAT IS THE TIME OF JAPAN [ 140 DEGREE EAST ]? PLEASE EXPLAIN HOW TO DO ?
The earth has 360 imaginary lines called longitudes or meridians running vertically between the poles. Each of these longitudes is called a degree. The 0 degree longitude passing through Greenwich, near London, is considered as standard and the time of all other time zones are calculated accordingly. The time difference between each longitude (each degree) is 4 minutes. So if it is 12 noon at Greenwich (0 degree), it would be 12:04 pm at 1 degree meridian and so on. 
Japan is 9 hours ahead of GMT, so the time can be calculated as follows

GMT                        Japan ST (GMT+9)
00:00 (midnight) 09:00 (9am)
01:00 (1am)          10:00 (10am)
02:00 (2am)          11:00 (11am)
03:00 (3am)          12:00 (noon)
04:00 (4am)          13:00 (1pm)
05:00 (5am)          14:00 (2pm)
06:00 (6am)        15:00 (3pm)
07:00 (7am)        16:00 (4pm)
08:00 (8am)        17:00 (5pm)
09:00 (9am)        18:00 (6pm)
10:00 (10am)    19:00 (7pm)
11:00 (11am)        20:00 (8pm)
12:00 (noon)        21:00 (9pm)
13:00 (1pm)        22:00 (10pm)
14:00 (2pm)        23:00 (11pm)
15:00 (3pm)        00:00 (midnight)
16:00 (4pm)        01:00 (1am)
17:00 (5pm)        02:00 (2am)
18:00 (6pm)        03:00 (3am)
19:00 (7pm)        04:00 (4am)
20:00 (8pm)        05:00 (5am)
21:00 (9pm)        06:00 (6am)
22:00 (10pm)    07:00 (7am)
23:00 (11pm)    08:00 (8am)


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