SOLUTION: You may remember learning in grade school that
30
%
of the surface of the Earth is land. Earth has a radius of
6300
km. Meanwhile, the surface area of Mars is
1.4
×
10
Algebra ->
Percentage-and-ratio-word-problems
-> SOLUTION: You may remember learning in grade school that
30
%
of the surface of the Earth is land. Earth has a radius of
6300
km. Meanwhile, the surface area of Mars is
1.4
×
10
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Question 1125805: You may remember learning in grade school that
30
%
of the surface of the Earth is land. Earth has a radius of
6300
km. Meanwhile, the surface area of Mars is
1.4
×
10
8
square kilometers. What is the ratio of the Earth's land area to Martian land area? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! surface area of a sphere is 4pir^2 or 4 pi*6300 km^2 or 498759249.7 km^2
30% of it is 149627774.9 km^2
divide by 1.4*10^8
ratio is 1.069
