What is the approximate ratio between the strength of the cement concr – McqOptions

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1.	What is the approximate ratio between the strength of the cement concrete at 7 days and 28 days ?
A.	\(1 \over3\)
B.	\(1 \over2\)
C.	\(3 \over4 \)
D.	\(2 \over3\)
Answer» E.

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