A sewer is laid from a manhole to a manhole , 250 m away along a gradient of 1 in 125. If the reduced level of the invert at is 205.75 m and the height of the boning rod is 3 m, the reduced level of the sight rail at , is (A) 208.75 m (B) 202.75 m (C) 206.75 m (D) 211.75 m

A sewer is laid from a manhole to a manhole , 250 m away along a gradient of 1 in 125. If the 

reduced level of the invert at is 205.75 m and the height of the boning rod is 3 m, the reduced 

level of the sight rail at , is 

(A) 208.75 m 

(B) 202.75 m 

(C) 206.75 m 

(D) 211.75 m

by

1 Answer

Answer :

(C) 206.75 m 

by

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