Answer / Amarnath Kumar

To calculate the required amounts of cement, water, and fly ash for a given volume, you can follow these steps:
1. Calculate the weight of cement per cubic meter (usually 1440 kg/m3).
2. Determine the weight of water based on the w/c ratio (in this case, 0.4 * weight of cement = 576 kg).
3. To find out the weight of fly ash needed when using a 1:9 ratio with cement, calculate 9 parts of cement and subtract it from the total weight of cement (remaining parts are fly ash).

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