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If the reduced level of a benchmark is 101.00 m. The back sight reading is 1.215 m and the fore sight is 1.810 m, the reduced level of the forward station is-
1. 100.405 m
2. 104.025 m
3. 104.305 m
4. 99.605 m

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Correct Answer - Option 1 : 100.405 m

Concept:

Reduced level (RL) of station A = RL of bench mark + BS reading – FS reading

Calculation:

Given:

Backsight (BS) reading on bench mark = 1.215 m

Reduced level (RL) of bench mark = 101.00 m

Foresight (FS) reading at a station = 1.810 m

Reduced level (RL) of station A = RL of bench mark + BS reading – FS reading

= 101 + 1.215 – 1.810

= 100.405 m

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