SOLUTION: the earth is approximately a sphere. its diameter is about 12 730 km. water cover approximately 66% of the earths surface. how many square kilometers of land cover the earth ?

Algebra ->  Surface-area -> SOLUTION: the earth is approximately a sphere. its diameter is about 12 730 km. water cover approximately 66% of the earths surface. how many square kilometers of land cover the earth ?      Log On


   

Question 484983: the earth is approximately a sphere. its diameter is about 12 730 km. water cover approximately 66% of the earths surface. how many square kilometers of land cover the earth ?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
r = d/2 = 6365 km
Area+=+4%2Api%2Ar%5E2 sq km
34% is land (100 - 66)
Land area = Area*0.34