Spiral Curve $($or Transition curve$)$

Problem $2$: The tangents of spiral curve intersect at an angle of $25$

at Sta $4+072.$ The radius of the central curve is $300$ m and the

length of the spiral curve is $52\mathrm{.}71$ m $.$ Determine the stationing of

the point where the spiral starts.

A$.3+911\mathrm{.}36$

B$.3+962\mathrm{.}28$

C$.3+907\mathrm{.}77$

D$.3+979\mathrm{.}05$