This question was previously asked in

Gujarat Engineering Service 2019 Official Paper (Engineering Aptitude)

Option 2 : 251.25 m

Building Material & Concrete Technology

15553

20 Questions
20 Marks
25 Mins

__Concept:__

\(True\;length\;line = \frac{{l'}}{l} \times measured\;length\\ \)

Where,

l' is corrected length of chain

l is actual length of chain

__Calculation:__

True length of line (L) = ?

Actual length of chain (l) = 20 m

Measured length of line (L') = 250 m

Corrected length of chain (l') = 20.1 m

So, we know

\(True\;length\;line = \frac{{l'}}{l} \times measured\;length\\ \)

\(\Rightarrow L = \frac{{20.1}}{{20}} \times 250\)

∴ L= 251.25 m