Which of the following statements is/are correct? 1. The time at 180° longitude is exactly 12 hours from the 0° longitude, irrespective of whether one travels westward or eastward from the Prime Meridian. 2. A person moving eastward on Tuesday will count the day as Wednesday once the International Date Line is crossed. Select the answer using the code given below.

Statement 1 is correct because the Earth rotates 360° in 24 hours, meaning each 15° of longitude represents one hour of time difference. Consequently, the 180° meridian (the antimeridian) is exactly 12 hours away from the 0° Prime Meridian, whether one calculates eastward (gaining 12 hours) or westward (losing 12 hours) [4]. Statement 2 is incorrect. When a person moves eastward across the International Date Line (IDL), they move from the Eastern Hemisphere (ahead in time) to the Western Hemisphere (behind in time), necessitating the subtraction of a day [3]. Therefore, a person crossing the IDL eastward on Tuesday would jump back to Monday, not forward to Wednesday. Conversely, traveling westward across the IDL involves adding a day [3].

Sources

1. [1] Certificate Physical and Human Geography , GC Leong (Oxford University press 3rd ed.) > Chapter 2: The Earth's Crust > The International Date Line > p. 14
2. [4] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 18: Latitudes and Longitudes > Explanation: > p. 247
3. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 18: Latitudes and Longitudes > Longitude and Time > p. 243