If P, Y and Z are the weights of cement, fine aggregates and coarse aggregates respetively and W/C is the water cement ratio, the minimum quantity of water to be added to first batch, is obtained by the equation

• A. 0.1 P + 0.3 Y + 0.1 Z = W/C x P
• B. 0.3 P + 0.1 Y + 0.01 Z = W/C x P
• C. 0.4 P + 0.2 Y + 0.01 Z = W/C x P
• D. 0.5 P + 0.3 Y + 0.01 Z = W/C x P