1.

What is the maximum shear stress for M20 grade concrete?

A. 2.5 N/mm<sup>2</sup>
B. 2.8 N/mm<sup>2</sup>
C. 3 N/mm<sup>2</sup>
D. 3.5 N/mm<sup>2</sup>
Answer» C. 3 N/mm<sup>2</sup>


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