Answer / Amritesh Ranjan

The dimensions used, such as 19x9x9 and 20x10x10, are common in civil engineering because they represent the standard sizes of reinforced concrete (RC) blocks. These dimensions facilitate easy handling, stacking, and alignment during construction due to their uniformity and ease of division into smaller units. The choice is not random but based on practical considerations such as workability, economy, and structural efficiency.

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