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The RL, of the point A which is on the floor is 100 m and back sight reading on A is 2.455 m. If the foresight reading on the point B which is one the ceiling is 2.745 m, the RL of point B will be
  • a)
    94.80 m
  • b)
    99.71 m
  • c)
    100.29 m
  • d)
    105.20
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The RL, of the point A which is on the floor is 100 m and back sight r...
Since the staff at the elevated point B on the ceiling is held vertically inverted
RL of B = RL of A + B.S.on A + FS on B
= 100 + 2.455 + 2.745 = 105.20 m
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Most Upvoted Answer
The RL, of the point A which is on the floor is 100 m and back sight r...
Given data:

RL of point A = 100 m
Backsight reading on A = 2.455 m
Foresight reading on point B = 2.745 m

To find: RL of point B

Solution:

1. Calculate height of instrument (HI):

HI = RL of A + backsight reading
HI = 100 + 2.455
HI = 102.455 m

2. Calculate reduced level (RL) of point B:

RL of B = HI - foresight reading
RL of B = 102.455 - 2.745
RL of B = 99.71 m

Therefore, the correct answer is option D) 105.20.
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Community Answer
The RL, of the point A which is on the floor is 100 m and back sight r...
The RL of point A which is on the floor is 100m & backsight reading on A is 2.455m,if the foresight reading on the point B which is on the celling is 2.745m, then RL of point B will be
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The RL, of the point A which is on the floor is 100 m and back sight reading on A is 2.455 m. If the foresight reading on the point B which is one the ceiling is 2.745 m, the RL of point B will bea)94.80 mb)99.71 mc)100.29 md)105.20Correct answer is option 'D'. Can you explain this answer?
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