Error Calculation Since the calculation of the density involves the product(division) of some measured numbers, the relative error of the result will the sum of relative error of factors. Ap-Am, AV _ Am+ , AL P V I First find the absolute errors for the lengths and masses, calculate the corresponding relative errors , add the corresponding relative error, with correct multiplicities (if formula has R, for example, then the relative error of volume will have a 2 4 R R term) Am = sphere / cube 4p= Am.AV =Am+3 p V L AV V = cylinder AP=L rectangle P