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प्रश्न
A dam has broader walls at the bottom than at the top. Explain.
उत्तर १
The pressure exerted by a liquid increases with its depth. Thus as depth increases, more and more pressure is exerted by water on wall of the dam. A thicker wall is required to withstand greater pressure, therefore, the thickness of the wall of dam increases towards the bottom.
उत्तर २
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