RRB NTPC Prelims Model Paper 14 with solutions

Gopal went to the Hospital at the speed of 60 km/hr while returning for his home hecovered the half of the distance at the speed of 10 km/hr, but suddenly he realized thathe was getting late so he increased the speed and reached the home by covering resthalf of the distance at the speed of 30km/hr. The average speed of the Pankaj in thewhole length of journey is: