Question 4 - MCQ Questions (1 Mark) - Chapter 2 Class 6 Geography - Latitudes and Longitudes - Geography

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 .