If an ascending gradient of 1 in 50 meets a descending gradient of 1 in 50, the length of summit curve for a stopping sight distance of 80 m will be%!

If an ascending gradient of 1 in 50 meets a descending gradient of 1 i

1.	If an ascending gradient of 1 in 50 meets a descending gradient of 1 in 50, the length of summit curve for a stopping sight distance of 80 m will be%!
A.	zero
B.	64m
C.	80m
D.	60m
Answer» E.