Civil Engineering > GATE 2019 SET-2 > Concrete Technology
The characteristic compressive strength of concrete required in a project is 25 MPa and the standard deviation in the observed compressive strength expected at site is 4 MPa. The average compressive strength of cubes tested at different water-cement (w/c) ratios using the same material as is used for the project is given in the table.
The water-cement ratio (in percent, round off to the lower integer) to be used in the mix is _______.
Correct : 46 to 46
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