Posted by tiffany on .
The earth is approx. a sphere. Its diameter is about 12 730 km. Water covers approx. 66 percent of the earths surface. How many square kilometres of land covers the earth?

math 
Ms. Sue,
Surface Area = 4 * pi * r^2
A = 4 * 3.14 * 6,365^2
A = 508,846,106
0.34 * 508,846,106 = ? 
math 
tiffany,
thankyou soooo much ms.sue

math 
Ms. Sue,
You're very welcome, Tiffany.

math 
dee,
where did you get the 0.34 from?

math 
Rachel,
The world is made up of land and earth. If there is 66% water then there can only be 34% land (whats left). 66% water plus 34% land = 100% of what makes up the earth.