Answer Posted / varun

M7.5 1:4:8(cement:fine:coarse)
M10(1:3:6)
M15(1:2:4)
M20(1:1.5:3)
M25(1:1:2)
M30,M35,M40,M45 are designed as per aggregate's
,water/cement ratio,type of sand and water are use..it is
designed as per design mix and there will be change in each
aspect....

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