Whether in India or abroad, wells are always round in shape.
A round shape is naturally strong and durable.
This is because water and soil exert equal pressure from all directions.
A circular structure can handle this uniform pressure more effectively reducing the risk of cracks
On the other hand, if a well built in square or triangular shape , the corners would bear more pressure than the flat sides.
This uneven distribution of pressure result in developing cracks and structural damage.
When digging deep into the ground the surrounding soil and stones push inward from all sides.
A round well distributes this force evenly across walls.
Even filled with water , circular shape of the well ensures that pressure remains balanced.
Other shapes of the well experience uneven pressure particularly at the corners.
This could lead to the collapse of the walls of well.
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