Town C is located on latitude 15oE while Town D is located on latitude 60oE. If the local time in Town C is 7.00am., what will be the local time in Town D?

Analyze the question: The question says "latitude," but 15°E and 60°E are actually longitudes (latitudes are measured north or south of the equator, not east or west). Longitude determines local time differences.

Concept: The Earth rotates 360° in 24 hours, so:

• 15° of longitude = 1 hour
• 1° of longitude = 4 minutes
• Places to the east are ahead in time (the sun rises there first), and places to the west are behind.

Solution:

1. Difference in longitude = 60°E − 15°E = 45°
2. Time difference = 45° ÷ 15° per hour = 3 hours
3. Town D is further east, so it is ahead of Town C: 7:00 a.m. + 3 hours = 10:00 a.m.

Answer: The local time in Town D is 10:00 a.m., which is option C.

Tip: Remember "East is Earlier in the day, so you add; West is Wait, so you subtract." Also, always divide the longitude difference by 15 to get hours. If both towns are on the same side of the Greenwich Meridian (both E or both W), subtract their longitudes. If they are on opposite sides, add them.