If the span and dip of a parabolic cable are L and h respectively, then the length of the cable is approximately equals to
1
L + 3/8 h
2
L + 8/3 h
3
L + 3/8 h2/L
4
L + 8/3 h2/L
If the span and dip of a parabolic cable are L and h respectively, then the length of the cable is approximately equals to