*$_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.	*$_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.