Find the number of cement bags required for 400 cft concrete in the ratio 1:6:12:
- 20 bags
- 26 bags
- 30 bags
- 36 bags
Explanation
Given ratio 1 : 6 : 12
Step 1: Total ratio
Cement = 1 part.
Step 2: Dry volume of concrete
For concrete, dry volume is usually taken as:
Step 3: Cement volume
Step 4: Number of cement bags
1 cement bag (50 kg) ≈ 1.25 ft³
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