Question

Two straight lines intersect at an angle of ${60}^{\circ }$. The radius of a curve joining the two straight lines is 600 m. The length of long chord and mid-ordinates in meter of the curve are

• A. 600.0, 39.89
• B. 600.0, 80.4
• C. 80.4, 600.0
• D. 49.89, 300.0

Answer 1

The correct option is B 600.0, 80.4

Length of longest chord,
$AB=2\times R\sin 30$
$=2\times 600\times \frac{1}{2}=600m$
Length of Mid ordinate,
$CD=R-R\cos {30}^{\circ }$
$=600-600\times \frac{\sqrt{3}}{2}=80.38m$