Civil Engineering - Structural Design Specifications - Discussion

34. 

The ratio of minimum compressive strength on 15 cm cubes prepared with the concrete of M 20 grade and M 40 grade, at 7 days should be at least

[A]. 1/3
[B]. 1/2
[C]. 3/2
[D]. 2.0

Answer: Option B

Explanation:

No answer description available for this question.

Ganesh said: (Jan 16, 2016)  
Can any one describe?

Krishna said: (Oct 18, 2016)  
At 7 days 65% strength expected.

65% 20/ 65% 40 = 1/2.

Kishan Singh said: (Aug 8, 2017)  
Yes, absolutely Right @Krishna.

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