What is the ratio of Grades M10,M15,M20,M25,M30,M35,M40.
Answer Posted / rajalakshmi m
M5 =1:5:10
M7.5=1:4:8
M10 =1:3:6
M15 =1:1.5:3
M20 =1:2:4
M25 =1:1:2
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