The viscosity  of a liquid can be calculated

6. The viscosity  of a liquid can be calculated using equation:  = Bt, where B is calibration
constant of the viscometer,  is the density of the liquid and t is time of flow through the
viscometer. In one experiment, water was used to calibrate the viscometer at 25.0C, and the
time of flow was measured as 200.30.2 s. At 25.0C, the density and viscosity of water are
0.99708 gmL−1
and 8.909  10−3
gcm−1
s
−1
, respectively. Using the same viscometer, the
time of flow was 425.60.5 s at 25.0C for an unknown liquid with density 0.85667 gmL−1
.
Determine constant B and the viscosity of the unknown liquid with error analysis.