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How Many Concrete Blocks Do I Need To Build A 4 Foot Tall By 40 Feet Long Wall?

3

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Multiply height by 1.5 (4 x 1.5 = 6) 6 rows
Multiply wall length by .75 (40 x .75 = 30) 30 blocks long
6 x 30 = 180 number of blocks needed ( 8" x 16" blocks )

3 bags of mortar per 100 block

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