Question

the pillars of bridges and flyovers have a broad base so that the pressure due to the heavy weight of the bridge become bearable to the ground​

Answer 1

Answer:

Pillars and Flyovers have broad base in order to bear the complete pressure of bridge and flyover along with vehicles.

Explanation:  

If the base is wider then the distribution of pressure takes place resulting in the low tension on pillars.

So Pillars and Flyovers have broad base in order to bear the complete pressure of bridge and flyover along with vehicles.