Airport Engineering - Engineering

Q1:

The reduced levels of the ends A and B 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.

ANS:C - 3075 m

Thanks @Anjila Bhatta.