The concrete mix of grade M 25 means that the compressive strength of 15 cm cubes at 28 days after mixing is

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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

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✅ Correct Answer: (C) 25 N/mm2

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