Question

The wall of a dam is made thicker at the bottom because ___.

• A. it is economically feasible
• B. it looks beautiful
• C. the government has laid down specific regulations to make the base of dams broader
• D. it supports increased water pressure at the depth

Answer 1

The correct option is D it supports increased water pressure at the depth

The pressure in the liquid increases with depth. Thus, as depth increases, more and more pressure is exerted by water on the wall of a dam. A thicker wall is required to withstand a greater pressure, therefore, the wall of the dam is made with the thickness increasing towards base.