(i) South Temperate zone
(ii) North Frigid zone
(iii) North Torrid zone
(iv) South Frigid zone
(v) North Torrid zone

There may be many points lie on the same latitude or longitude.
But, there would be only one point where a latitude and longitude intersect each other. By meeting two points (latitude and longitude), a point can be located.

The local time of places on different meridians are bound to differ. The time difference within a country may be more than two hours. Therefore, it is necessary to have a standard time for a country. That's why the Earth is divided into 24 time zones.

India located at 82° 30' East of Greenwich is 5 hours 30 minutes ahead of Greenwich meantime. That's why if it is 5.30 p.m. in India, it will be 12.00 noon in London.

The mid-day sun at least once in a year is exactly overhead on all latitudes in area between the tropic of Cancer and tropic of Capricorn. Therefore, the Torrid zone receives the maximum amount of heat.

(i) 23°30' N is value of the Tropic of Cancer.
(ii) Frigid zone is situated between 66030' and poles.

Local time is based on the local meridian passing through that place. The places lying North and South on the same meridian will have the same local time and the places lying East or West of that meridian will have different local times. It is important because the time for any country is measured by the local time. The local time of places on different meridians are different. Therefore, it will be difficult to prepare time-table for trains which cross several longitudes.
For example There will be a difference of about 1 hour and 45 minutes in the local times of Dwarka in Gujarat and Dibrugarh in Assam. Therefore, it is necessary to adopt the local time of some central meridian of a country as the standard time for the country.