The Length of a Long Chord is Equal to

Answer: B. 2R sin Δ/2

In a circular curve, the length of a long chord is equal to 2R sin Δ/2.

Solution

• Length of the long chord (P₁P₂) =2R sinΔ/2
• Length of tangent (P₁D) =R tanΔ
• Length of curve = πRΔ/180
• Mid-ordinate (CE) =R (1- cos Δ/2)
• External distance (ED) =R (sec Δ/2-1)

So, the length of a long chord is equal to 2RSin Δ/2 for a circular curve.

☛ Related Questions:

• The steel generally used in RCC work is
• According to St.Venant's theory, yield locus is
• In chain surveying field work is limited to