The total number of meridians at an interval of 5° are
A. 73
B. 71
C. 72
D. 79
Answer:
Answer by Student
The correct answer is (C) 72 .
Detailed Explanation by Teachoo
Let’s check all the options and explain why they are correct or incorrect.
- Option (A) 73 -It includes the Prime Meridian twice, once as 0° and once as 360°. The Prime Meridian is the same line of longitude, so it should be counted only once. So, This option is incorrect .
- Option (B) 71 - It excludes the Prime Meridian, which is also a meridian at an interval of 5°. The Prime Meridian is the reference line for measuring longitude, but it is also a meridian itself. So, this option is incorrect .
- Option (C) 72 - It counts the Prime Meridian as one meridian and then adds 71 more meridians at an interval of 5° on both sides of it. The total number of meridians at an interval of 5° is 1 + 71 = 72 . So, this option is correct .
- Option (D) 79 - It adds seven extra meridians that do not exist. There are only 360 degrees in a circle, so there can be only 72 meridians at an interval of 5°. So, this option is incorrect .