Fuller's formula: \# of bags of cement \( =\frac{}{c+s+g}=\frac{}{1+2+4} \cdot \) volume \( =1189 \) bags
75. A national highway project is 7.2 m wide, 1 km long and 25 cm thick, compute for the number of bags of cement, sand and gravel in m3 using class "A" mixture.