WAEC - Mathematics (1988 - No. 30)
Abidjan is 4o west of Accra and on the same circle of latitude. If the radius of this circle of latitude is 6370km, how far is Abidjan west of Accra, correct to the nearest kilometer? [Take π = 22/7]
222km
445km
890km
5005km
10010km
Giải thích
θ360
* 2πr = Rcos4o4360
* 400411
= 445km