1.

The reduced levels of the ends and of a runway are 3025 m and 3035 m and that of its mid-point is 3015 m. The reduced level of the horizontal surface, is

A. 3070 m
B. 3060 m
C. 3075 m
D. 3015 m
E. none of these.
Answer» D. 3015 m


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