Motion and Time

Distance between Bholu’s and Golu’s house is 9 km. Bholu
has to attend Golu’s birthday party at 7 o’clock. He started
from his home at 6 o’clock on his bicycle and covered a distance
of 6 km in 40 minutes. At that point he met Chintu and he
spoke to him for 5 minutes and reached Golu’s birthday party
at 7 o’clock. With what speed did he cover the second part of
the journey? Calculate his average speed for the entire journey.