Two parallel railway lines are to be connected by a reverse curve, each section having the same radius. If the lines are 12 m apart and the maximum distance between tangent points measured parallel to the straights is 48 m, then the maximum allowable radius will be

Two parallel railway lines are to be connected by a reverse curve, eac

1.	Two parallel railway lines are to be connected by a reverse curve, each section having the same radius. If the lines are 12 m apart and the maximum distance between tangent points measured parallel to the straights is 48 m, then the maximum allowable radius will be
A.	51.1 m
B.	52.3 m
C.	53.5 m
D.	54.7 m
Answer» B. 52.3 m