Question: how many square meter in 1 bag of cement?
Answer: The mix: 1:3:6 for cement: fine aggregate (sand): coarse aggregate (granite) by mass (kg). Therefore, The mass of cement required= 0.0228 * 1440 = 32.832 kg. The number of bags of cement required= 32.832/50 = 0.66 bag (ie 1 bag of cement is required to cover a 1m * 1m * 0.15m floor in a concrete mix 1:3:6).