MCQ Questions (1 Mark)

Geography
Chapter 2 Class 6 Geography - Latitudes and Longitudes

## The total number of meridians at an interval of  5° are

### D. 79

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

#### Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.