Estimating and Costing - Engineering

Q1:

The reduced levels of points, 30 metres apart along the longitudinal section of a road portion between chainages 5 and 9 are shown in the given figure. If there is a uniform up-gradient of the road 120 in 1, the chainage of the point with no filling or cutting is

A (6 + 15) chains

B (6 + 12) chains

C (6 + 18) chains

D None of these.

ANS:B - (6 + 12) chains

Thanks for your explanation @Gance.