The surface area of the Rocky Mountains is approximately 523,000 square kilometers.
Antarctica has a total area of approximately 14 million square kilometers, making it the fifth largest continent in terms of area.
A batholith is a pluton exposed across more than 100 square km of Earth's surface. An average batholith is about 10 km thick, but can be up to 20 km thick. A stock is very similar to a batholith, but with less than 100 square km exposed.
from Wikipedia: http://en.wikipedia.org/wiki/Continental_United_States The 48 states and D.C. together have an area of 3,119,884.69 square miles (8,080,464.25 km²). Of this, 2,959,064.44 sq mi (7,663,941.71 km²) is land, comprising 83.65% of U.S. land area. Officially, 160,820.25 sq mi (416,522.38 km²) is water area, comprising 62.66% of the nation's water area. Its 2000 census population was 279,583,437, comprising 99.35% of the nation's population. Its population density was 94.484 inhabitants/sq mi (36.48/km²), compared to 79.555/sq mi (30.716/km²) for the nation as a whole. Entered into WikiAnswers Sept 9, 2009
Austria's total land area is approximately 83,879 square kilometers.
The area of a circle can be calculated using the formula A = πr^2, where r is the radius. Given a radius of 45 km, the area would be approximately 6,366 square kilometers.
Area of a circle = (pi) x (square of radius) = (pi) x (5)2 = 25 pi = 78.54 square km (rounded)
A circle with a radius of 0.9 km has an area of 2.54 square km
The surface area of Mars is approximately 144,798,500 square kilometers. The equatorial radius is about 3,396 km and the polar radius is 3,376 km.
An area of 5km radius implies a circle. The area of a circle of radius r is {pi}r2. Area ~= 3.14 x 5 x 5 km2 ~= 78.54 km2.
The answer depends on what is 10 km: the radius, diameter, perimeter. And since you have not bothered to share that crucial bit of information, I cannot provide a more useful answer.
It is: pi*352 = 3848.451 square km to 3 decimal places
It is: 4*pi*64002 square km
The area of the crater can be calculated using the formula for the area of a circle: A = πr^2, where r is the radius. Given a radius of 85 km, the area of the crater would be approximately 22,665 square kilometers.
It is: 270/360*pi*2 squared = 3*pi square km
Using 3.14 as Pi the area of circle is: 615.44
Area of circle: pi*6.5^2 =132.732 square km to 3 decimal places