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Introduction
Objects, occupying space in the three dimensions, are known as having solid shapes. Cylinder, cone, sphere,prism, and hemisphere are examples of solids, which have curved shapes with or without a flat top and bottom or both. The cube, pyramid, and cuboid are also solids, which have only flat sides around and top and bottom.
The outer surfaces of these solids are exposed to the atmosphere. The total such area of the solid is the total of all its surface, both the curved and flat areas in solid having curved shapes. In the case of solids with flat sides, the total exposed area of a surface is the total of areas of all its sides including top and bottom. The area of each solid is calculated in square units.
The inner space of the solids may be solid as a cube or as a road- roller or empty as a pot, measuring jar, drum, gas cylinder. Cube, cuboid, cone, etc. The empty interior space of these solids facilitates the use of them as containers. Thus, they have volumes. The volumes of individual solids can be calculated in cubic units according to their shapes.
Solid Shapes
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Wilting is the loss of rigidity of non-woody parts of plants. This occurs when the turgor pressure in non-lignified plant cells falls towards zero, as a result of diminished water in the cells. Wilting also serves to reduce water loss, as it makes the leaves expose less surface area.