We went to France to Pont du Gard. We decided to climb to the top floor. Everyone went up on the right side of the bridge, only Honza went on the left side. He reached the top at 10:02 and walked to us at average speed of 0,5 km/h (he was shooting). We reached the top at 10:04 and sledged towards him 1,5 km/h. How long and how far we rode our sledge before we met Honza?