Question

Why are dams over bridge made broader ar bottom than at top?

Answer 1

hey mate here is your answer

it is because to increase the surface area in contact with the ground to release the pressure to the ground.

hope it helps you

Answer 2

Pressure exerted by a liquid is dependent on the depth that it increases with greater pressure . That is to say, as the depth increases, pressure applied by water on the walls of the dam also increases. In order to withstand the great pressure, the walls are build thicker. Hence a dam has broader walls at the bottom then at the top.

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