The Reduced Levels (RLs) of the points P and Q are +49.600 m and +51.870 m respectively: Distance PQ is 20 m. The distance (in m from P) at which the
Question
The Reduced Levels (RLs) of the points P and Q are +49.600 m and +51.870 m respectively: Distance PQ is 20 m. The distance (in m from P) at which the +51.00 m contour cuts the line PQ is-