Distance between bholu and golu house house 9 km . bholu has to attend golu birthday party at 7am . he started from his home at 6 am on his bicycle and covered a distance of 6 km in 40 mins . At that point he met chintu and he spoke to him for 5 mins and reached goku's birthday party at 7 am . with what speed did he cover the second part of the journey ? calculate his average speed for the entire journey?