Question

In which longitude we should never write 'E' or 'W'?
A. 0°
B. 45°
C. 90°
D. 180°

Answer 1

Hint: Longitudes are known as meridians of longitude. Each meridian is one arc degree and the distance around the Earth measures 360 degrees.

Complete Answer:
Longitudes are imaginary lines which run vertically and measure the east or west of the prime meridian. They meet at the North and South Poles. The central Meridian 82° 30' E is taken as the Indian Standard Time and is approved all over the country for uniformity of time.

- The prime meridian which runs from north to south is 0°. It runs through Greenwich, England. It is accepted internationally . This option is incorrect.
- The meridian 45° which is the east of Greenwich forms a great circle with 135th meridian west. It expands from the North Pole across the Arctic Ocean, Europe, Asia, Africa, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole. This option is incorrect.
- The meridian 90° is written in the form of east as well as west. This option is incorrect.
- The 180° meridian runs from east to west of the prime meridian. It divides the Earth into two Northern hemisphere and Southern Hemisphere and is common to both east longitude and west longitude. It has no direction and is not written in the form of E or W. This option is correct.

Hence the correct answer is option 'D'.

Note: Each degree of longitude is 111 km. The point where the parallels of latitude and meridians of longitude intersect is called a coordinate. Longitudes enable us to measure location and time of a place using a single standard.