WAEC Geography 2010 Papers

Concept:The Earth rotates $360^\circ$ in 24 hours, so it turns $15^\circ$ per hour.A place with a later local time lies to the east of the reference longitude.Explanation:At Point X, longitude $0^\circ$, the time is 12:00 noon.At Point Y, the time is 10:00 pm, which is 10 hours later than noon.Time difference between X and Y = $10$ hours.Longitude difference = $10 \times 15^\circ = 150^\circ$.Since Point Y has a later time, it is east of longitude $0^\circ$.Therefore, the longitude of Point Y is $150^\circ$E.Answer:$150^\circ$EOption A.