The maximum compressive strength on 15 cm cubes of M 20 grade concrete at 7 days, should be a minimum of

1.

The maximum compressive strength on 15 cm cubes of M 20 grade concrete at 7 days, should be a minimum of

[A].	7 N/mm2
[B].	10 N/mm2
[C].	15 N/mm2
[D].	20 N/mm2

Answer: Option B

Explanation:

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