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A 4 circular curve based on a 20 m. arc connects the tangents intersecting at an angle of 48. It is to be replaced by

A 4° circular curve based on a 20 m. arc connects the tangents intersecting at an angle of 48°. It is to be replaced by another having 20 m. spirals at its ends such that the points of tangency shall be the same. Find the following:

a. Deflection angle of the endpoint of the spiral.

b. Distance along the tangent of the midpoint of the spiral.

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