Correction per chain length of 100 links along a slope of α° is

ANS:A -

= h^2/2*l
= (l sina)^2/2*l.

= l*a^2/2 [in radian converting to degree i.e. (pi/180)^2].
= 0.00015*l*a^2.
= 1.5/100*a^2. No ^ terms mean the answer is to be in *a* degree, by only looking at options.

Let's assume L*a=h like in h^2/2L.

This gives in terms of a^2.