With sides of length A, B and C units, the total surface area is
2*(AB + BC + CA) square units.
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Surface area = 2*(L*B + B*H + H*L) cubic unitswhere L = length B = Breadth H = Height.
It dependsThat depends upon the shape of the object. Formulas for certain regular shapes are known. For example, the volume of a sphere, cylinder, cone, or cube can be easily determined from its dimensions. For irregular shapes, however, you have to submerge them in water and measure the amount of water they displace.
France has an area of 678,843 sq km and the Earth has a surface area of 510,072,000 sq km. Therefore France occupies approximately 0.1323% of the world's surface.
The area of Africa is about 30.2 million km² (11.7 million sq miles) This means it covers 6% of the Earth's total surface area and 20.4% of the total land area.
2*(L*B + B*H + H*L) cubic units where L = length B = Breadth H = Height.