Thank you sir.
Truly genius.
Please also could you clarify.
On a Direct Mercator chart at latitude of 45°N, a certain length represents a distance of 90 NM on the earth. The same length on the chart will represent on the earth, at latitude 30°N, a distance of :
a 45 NM
b 73.5 NM
c 78 NM
d 110 NM
&
The standard parallels of a Lambert's conical orthomorphic projection are 07°40'N and 38°20' N. The constant of the cone for this chart is:
a 0.60
b 0.39
c 0.92
d 0.42