Q. The distance of 1° longitude on Earth is almost equal to which of the following?
Answer: 111 km.
Notes: At the equator, 1o of latitude or longitude represents approximately 111 km (approximately 70 miles). A degree of longitude is widest at the equator at 69.172 miles (111.321 km) and gradually shrinks to zero at the poles. At 40° north or south the distance between a degree of longitude is 53 miles (85 km).