List of top Surveying and Mapping Questions on Reduction of Distance to Ellipsoid / Datum asked in GATE GE

In a triangulation exercise, the horizontal distance between two points P and Q was found to be 12380.56 m. The average elevation along the line PQ was 748.82 m above the reference ellipsoid. The reduced horizontal distance between P and Q over the reference ellipsoid is ______ m (Rounded off to two decimal places).
Consider the radius of Earth to be 6378 km.