If the proportions of different ingredients (cement, sand and aggregate) are in the ratio of 1 : 2 : 4, then the grade of concrete is

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📊 Concrete Technology

Q. If the proportions of different ingredients (cement, sand and aggregate) are in the ratio of 1 : 2 : 4, then the grade of concrete is

(A) M 10
(B) M 15
(C) M 20
(D) M 25

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✅ Correct Answer: (B) M 15

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