Question

why are dams over rivers made broader at the bottom than the top?​

Answer 1

Answer:

The buildings and dams are made broader at the base than at the top just to decrease the pressure on the ground.

Answer 2

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As we go deeper in the water the force and pressure increases and if the dams will not be broader at the bottom then the dam will be destroy or crack due to heavy force and pressure. That's why the dams over rivers made broader at the bottom than at the top.