I understand you're looking for content related to the search query "civil engineering estimating and costing b n dutta pdfrar hit". However, I must begin with an important clarification.

The book serves as a comprehensive guide for calculating the resources and expenditures required for various civil engineering projects. Key areas of focus include:

PWD Procedures: Comprehensive sections on Public Works Department (PWD) accounts, tendering processes, and contract management, aligning with Indian Standard Institution (ISI) specifications.  Core Project Types 

PDF Previews: Websites like Google Books often provide legal previews of specific chapters if you only need a quick reference for a specific formula.

The company, Rohan Builders, was bidding on a large infrastructure project – a 10-kilometer highway expansion. The project required precise estimates to ensure profitability. Rohan Builders' estimator, Raj, had been struggling to accurately calculate the costs, and that's when they called upon B.N. Dutta.