The curvature of the earth’s surface, is taken into account only if the extent of survey is more than

The curvature of the earth’s surface, is taken into account only if

1.	The curvature of the earth’s surface, is taken into account only if the extent of survey is more than
A.	100 sq km
B.	160 sq km
C.	200 sq km
D.	260 sq km
Answer» E.