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Q. |
The concrete mix of grade M 25 means that the compressive strength of 15 cm cubes at 28 days after mixing is |
A. | 15 N/mm2 |
B. | 20 N/mm2 |
C. | 25 N/mm2 |
D. | 30 N/mm2 |
Answer» C. 25 N/mm2 |
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