We have studied that the local time is different in different parts of the world. The daily routine of the people there is determined according to the local time in those places. Figure 1.3 shows the local times of different longitudes. Study this map and answer the following questions. Use the relationship between degrees and time for this.

A) Between which longitudes do the region experience daytime?

B) Which longitudes experience noon and midnight respectively?

C) Edward from New Orleans is on which longitude?

D) What is the time at Accra city?

E) At the same time, what is Sharad from Patna and Yakaito from Japan doing? What time is it in these cities?

F) Select any one longitude. Calculate the local time of the longitudes lying 1° to the west and east of this longitude.

A) The region which experiences daytime lies between the longitude 90-degrees East and 90-degrees West.

B) The longitude which experiences noon is the zero degrees longitude which is also called Greenwich Mean Time and the longitude which experiences midnight is 180 degrees east or west longitude. (180 degrees east and 180 degrees west are the same).

C) Edward from New Orleans is located on longitude 90 degrees 04'west in the United States.

D) Accra city is located at latitude 5.55 degree and longitude -0.19 in the northern hemisphere as shown in the map. Hence the time is 12 noon.

E) At the same time Sharad from Patna is going to school as it is early in the morning and Yakaito from Japan is preparing her bed as she is going to bed for sleep because it is night there.

F) Let the selected longitude be 30 degrees. The time at this longitude is two p.m. that is it is the daytime. The difference between two consecutive longitudes is 4 minutes.

So the longitude lying 1 degree east to the 30-degrees longitude is 31-degrees longitude. The time at this longitude will be

2:00 p.m. + 4 minutes (as the difference between two consecutive longitudes is of 4 minutes)= 2:04 p.m.

Similarly, the longitude lying 1 degree west to the 30-degrees longitude is 29-degrees west longitude and the time is calculated as

2:00 p.m. – 4 minutes which would be equal to 1:56 p.m. or 13:56 hours according to the hours of the day.