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Flatworms have a higher surface area/volume ratio compared to a cylindrical worm, this is one of the reasons for flatworms to have the structure they do.
times leagth times weith
The area of a three dementional figure is divided into lateral surface area and total surface area. The total surface area of a cylindrical box can be calculated by using the formula : 2 times pi times radius squared plus 2 times pi times radius times hight The lateral surface area can be calculated by the formula: 2 times pi times radius times height
The area of the cylindrical part of the surface is equal to the perimeter of the base multiplied by the height. The perimeter of a circle with diameter 12 is pi times the diameter; therefore, the area of the cylindrical part of the surface is 12 X 15 X pi = 5.6 X 102. (Only two significant digits are justified, since there are only two in the primary data.) Sometimes the surface area is considered to include the upper lower bases of the cylinder along with the cylindrical area. The area of a circle is pi multiplied by the square of the radius, which is half the diameter. (12/2)2 X pi = 1.1 X 102. If both bases are added to the cylindrical area, the total area is 7.8 X 102, to the justified number of significant digits.
Surface area = (2*pi*0.922)+(2*pi*0.92*2.6) = 20.347 m2 to 3 decimal places