SOLUTION: The diameter of Mars is 4,200 miles. How many square miles is the surface area of Mars?

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Question 1057831: The diameter of Mars is 4,200 miles. How many square miles is the surface area of Mars?


Found 2 solutions by stanbon, solve_for_x:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The diameter of Mars is 4,200 miles.
How many square miles is the surface area of Mars
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Surface Area = 4*pi*r^2 = 4*pi*2100^2 = 17640000pi sq miles
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Cheers,
Stan H.
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Answer by solve_for_x(190) About Me  (Show Source):
You can put this solution on YOUR website!
The surface area of a sphere is given by:

SA+=+4pi%2Ar%5E2

With a diameter of 4,200 miles, the radius is r = 2,100 miles.

The surface area is then:

SA+=+4pi%2A%282100%29%5E2%29+=+17640000pi = 55,417,694.41 square miles