Three independent lines of
levels are run from BM1 to BM2. Route A is 6
km long, route B is 4 km long and route C is 8
km long. By route A, BM2 is 82.27 m above
BM1, by route B, BM2 is 82.40 m above BM1
and by route C, BM2 is 82.10 m above BM1.
1. Compute the probable elevation of BM2
if the elevation of BM1 is 30.5 m.
a. 113.13 m c. 113.45 m
b. 112.79 m d. 113.06 m