A masonry wall uses 8×8×16 inch CMU blocks. If the wall is 100 feet long and 12 feet high, approximately how many blocks are needed (assuming 10% waste)?
Correct Answer
D) 1,485 blocks
Wall area = 100×12 = 1,200 sq ft. Block face area = 16×8 = 128 sq in = 0.89 sq ft. Blocks needed = 1,200/0.89 = 1,348 + 10% waste = 1,483 ≈ 1,485 blocks
Why This Is the Correct Answer
Wall area = 100×12 = 1,200 sq ft. Block face area = 16×8 = 128 sq in = 0.89 sq ft. Blocks needed = 1,200/0.89 = 1,348 + 10% waste = 1,483 ≈ 1,485 blocks
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