Question

If the chainage of point of commencement of a circular curve for a normal chord of 20 m is 2002.48 m, the length of first subchord will be

• A. 18.48 m
• B. 17.52 m
• C. 20 m
• D. 2.48 m

Answer 1

The correct option is B 17.52 m

Chainage of a point commencement of circular curve,

$T_1=2002.48m$

Length of normal chord = 20 m

$\therefore$ The length of first subchord = (2020 - 2002.48) m

= 17.52 m

Note: First chord of the curve, will be a sub-chord, so as to make the first point a full station, i.e., chainage of first point is a multiple of 20.