A person traveled a distance of 50 km in 8 hours. He covered a part of the distance on foot at the rate of 4 km per hour and a part on a bicycle at the rate of 10 km per hour. How much distance did he travel on foot?[UPSC 2010 (CS-P)]
a) 10 km
b) 20 km
c) 30 km
d) 40 km

• Total distance is 50 km, he spend total 8 hours, he spend 5 hours by walk and 3 hours by bicycle. By walk speed is 4 km per hour. ie 5 hours *4 kmph=20 kms and by bicycle speed is 10 km per hour. it 3hours * 10kmph = 30kms. total is 20+30=50 kms.
• 7 years agoHelpfull: Yes(2) No(1)