A tacheometer was setup at station P and the following readings were taken at two stations A and B with the staff held vertical and the line of sight horizontal.
| Line | Bearing | Staff intercept |
|---|---|---|
| PA | 210° | 1.2 m |
| PB | 135° | 1.4 m |
The additive and multiplying constants of the tacheometer are 0 and 100, respectively. The length of AB in m is ______ (round off to 1 decimal place).
Min: 157 Max: 161
Answer: 159
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