Why is the base of a wall kept wide?
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The reason is that the pressure exerted by a liquid increases with its depth. Thus, as the depth increases, more and more pressure is exerted by water on the wall of the dam. A thicker wall is required to withstand greater pressure, therefore, the thickness of the dam walls increases towards the bottom.
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Smaller area will exert more pressure, thus the foundation ofbuildings, which are heavier than walls are made wide so that is doesn't exert too much force on the ground and penetrate into it. THE FOUNDATIONS OF HIGH-RISE BUILDINGS ARE WIDE. THIS REDUCES THE PRESSURE OF THE BUILDING ON THE GROUND.
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