In concrete masonry, a hollow concrete block has core-void area greater than __________ of the gross area.

In concrete masonry, a hollow concrete block has core-void area greater than __________ of the gross area. Correct Answer 25%

Concrete masonry uses two types of cement concrete blocks for the construction of walls – hollow concrete block and solid concrete block. A hollow concrete block has core-void area greater than 25% of the gross area.
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In concrete masonry, a hollow concrete block has a core-void area greater than __________ of the gross area.
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