JAMB Geography 2024 Paper

Concept:The equatorial diameter is the distance across the Earth through its centre, measured between two opposite points on the equator.Explanation:The Earth bulges slightly at the equator, so its standard equatorial radius is about $6{,}378$ km.Diameter is twice the radius, so$$D = 2 \times 6{,}378\text{ km} = 12{,}756\text{ km}.$$Thus, the equatorial diameter is approximately $12{,}756$ km.The value $6{,}760$ km given in the original solution is not the accepted equatorial diameter.As printed, none of the four options matches the correct value, so the options likely contain a typing error.Answer:Approximately $12{,}756$ km.