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Q1: If Δ is the angle of deflection of a simple curve of radius R, the length of the curve is

A

B

C

D .

ANS:B -

This is basically derived by comparing the length of the arc (S) & its corresponding angle (Δ") to the circumference of the circle (2&pi*r) & its corresponding angle (360 deg)...
S/Δ" = 2π*r/360,
S = π*r*δ"/180.



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