Asked by Ali
                Assume that a theodolite sits between Point-A (BM) and Point-B. If the elevation of Point-A is 23.56m, the RR at BS is 1.4m, the RR at IS is 1.86m, and the RR at FS is 2.3m. Then, the elevation of HI is equal to: 
            
            
        Answers
                    Answered by
            oobleck
            
    maybe you should describe the diagram, and explain what all those two-letter abbreviations mean.
    
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