Question

According to Sir Sandford Fleming, degrees of longitudes by which 24 time zones are divided is ______________.
A. 5 of Longitude
B. 15 of Longitude
C. 25 of Longitude
D. 10 of Longitude

Answer 1

Hint:The Earth is grouped into 24 time zones. The idea to divide the Earth into time zones was first proposed by the Canadian railway planner and engineer Sir Sandford Fleming (1827 - 1915) in the late 1870s. These 24 global time zones are about 15 degrees wide and vary from one hour to another.

Complete answer:
Time zones were first introduced in 1883. World time Zones were determined at an International Conference in Washington in 1884. Each of the 24 world time zones is around 15 degrees wide and varies by an hour from North Pole to South Pole. It soon expanded internationally. There are 360 longitudes and these longitudes are further divided into 24 time zones. All the people in one time zone would set their clock the same way (to the local time in the center of the time zone) (to the local time in the center of the time zone). So it was already 7:00 a.m. in the morning, 12:00 a.m. in the middle of the day and 7:00 p.m. in the evening.
But this was much more convenient than the older local time use scheme. The same time zone settings are used by the majority of nearby cities. And if there are two different time zones in two towns, the time settings often vary by an entire number of hours (1 hour, 2 hours, 3 hours, etc.) which makes it easy to convert from one time zone to another time zone.
15 degrees can be counted as one hour, i.e. 360/15=24, in order to distinguish 24 time zones from 360 distances. 1 degree is therefore, equivalent to 4 minutes i.e. 360/15=24. Therefore, 1 degree is equal to 4 minutes.

Hence, the correct answer is option B.

Note:At approximately 180o, precisely halfway around the globe from Greenwich, the imaginary line where travelers change from one date to another (conveniently drawn through the Pacific Ocean so no countries are divided into separate days).
A multiple of 7.5 degrees should be the spatial difference between two time meridians, so that the time difference is either in half or maximum hours (7.5 degrees * 4 min/degrees = 30 minutes).