If the intercept on a staff located at 100 m from the level for a five divisions deviation of the bubble is 0.050 m and if length of the one division of the bubble is 2 mm, then the radius of curvature of the bubble is
A. 15 m
B. 20 m
C. 25 m
D. 30 m
Answer:B
If the intercept on a staff located at 100 m from the level for a five divisions deviation of the bubble is 0.050 m and if length of the one division of the bubble is 2 mm, then the radius of curvature of the bubble is
A. 15 m B. 20 m C. 25 m D. 30 m