in continuation of the above note on would like to add the following
1. in road it is not only the aggregates .there is ashpalt. quay dust ETC.
2.more over when the volume is calculated u have to add bulkage,wastage et
3.for adding bulkage u should measured the material at site to come to cal calculation.
4.in case of if u providing the details I might be n a position to provide clear pcturr