SOLUTION: The density and strength of concrete are determined by the ratio of cement and aggregate
(aggregate is sand, gravel, or crushed stone). Suppose that a contractor has 480 ft
3
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(aggregate is sand, gravel, or crushed stone). Suppose that a contractor has 480 ft
3
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Question 1124462: The density and strength of concrete are determined by the ratio of cement and aggregate
(aggregate is sand, gravel, or crushed stone). Suppose that a contractor has 480 ft
3
of a dry
concrete mixture that is 70% sand by volume. How much pure sand must be added to form a
new mixture that is 75% sand by volume? Answer by josgarithmetic(39617) (Show Source):
(