A 100 M-High Retaining Wall Is Built Out of Concrete Blocks

question 18

Multiple Choice

A 1.00 m-high retaining wall is built out of concrete blocks. Each block weighs 22.2 N and has dimensions of 20.3 cm 9.20 cm 5.60 cm. Estimate the minimum volume stress on a block at the very bottom layer of the wall. Assume that the largest surface areas of blocks are facing each other, the height of the wall cannot exceed 1.00 m, and ignore the thin layer of cement between those faces.

• A) 2.0210⁴ N/m²
• B) 1.9010⁴ N/m²
• C) 2.1410⁴ N/m²
• D) 3.4510⁵ N/m²
• E) 1.87 N/m²

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