The following readings were obtained during differential levelling.
Reduced Level (RL) of point A is 240.000 m. The fore sight and back sight between points A and TPI is 1.420 m and 2.024 m, respectively. Fore sight and back sight between points TPI and TP2 is 2.100 m and 1.986 m, respectively. The back sight from B is 1.722 m. These are marked on the given figure. What is the RL at turning point - 2 (TP2)?
All values are in metres.
1
242.024 m
2
241.202 m
3
240.604 m
4
240.490 m