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How many bags of cement will cover a slap size 401cm³ ratio 1.2.4?

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To calculate the number of cement bags required for a slab of 401 cm³ with a mix ratio of 1:2:4 (cement:sand:aggregate), we need to follow these steps:

  1. Convert Volume to Cubic Meters:

    • 401 cm³ = 0.000401 m³
  2. Calculate the Total Parts of the Mix:

    • Total parts = 1 (cement) + 2 (sand) + 4 (aggregate) = 7 parts
  3. Determine the Volume of Cement:

    • Volume of cement = (1/7) * 0.000401 m³ = 0.0000573 m³
  4. Convert Cement Volume to Bags:

    • One bag of cement (50 kg) typically equals 0.035 m³ of concrete.
    • Number of bags = 0.0000573 m³ / 0.035 m³ per bag ≈ 0.00164 bags

Given the small volume of 401 cm³, it translates to approximately 0.00164 bags of cement, which is less than one bag. For practical purposes, you would need to scale up the volume or mix to use a full bag of cement.


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