Answer Posted / s.mohamed imthiyaz

1+2+4=7........ then total ingredient=1.57
1part of cement..... So 1 / 7 =0.142
Then 0.142*1.57=0.2229
Unit weight of concrete is 1440kg/m3
0.2229*1440=320.97kg
1cement bag=50kg
320.97/50= 6.41 bags................

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