Civil Engineering - Surveying - Discussion

in these questions of slope correction, to arrive at the answer form the given options; I found the unit to be the key. here answer could be in mm, cm or m. we just need to analyze units ourselves based on the answers provided.
Here,
1. slope correction is h^2/(2*L)
2. As the answer is in terms of 1.5, let the chain length be 30 m and not 20m. Otherwise, we can't arrive at 1.5.
3. The slope correction = α^2*L^2/(2L) = α^2 * L/2 = α^2 *15 m.
4. α^2 *15*10^-3 mm. = 1.5*α^2/100 mm.

= 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.

Please explain the answer if anyone knows.

Please explain the answer clearly.

Please explain this in detail.

Can anyone this?

Can anyone explain this?

Please explain it sir.

Please explain this question.