If is the difference in level between end points separated by , then the slope correction is [(h²/2l) + (h4/8l3)]. The second term may be neglected if the value of in a 20 m distance is less than

If is the difference in level between end points separated by , then t

1.	If is the difference in level between end points separated by , then the slope correction is [(h²/2l) + (h4/8l3)]. The second term may be neglected if the value of in a 20 m distance is less than
A.	½ m
B.	1 m
C.	2 m
D.	3 m
Answer» E.