Question

Calculate the target mean compressive strength at 28 days curing, for M20 grade concrete, as per IS 10262-2009 (take standard deviation as 4 N/mm²).

• A. 20.0 N/mm²
• B. 28.7 N/mm²
• C. 22.4 N/mm²
• D. 26.6 N/mm²

Answer 1

Answer: (D)