A person covers a distance of 40km by bus in 70mins. After deboarding the bus, he took a rest for 40mins and covered another 20km by taxi in 40mins. Find his average speed for the whole journey.
- A26km/h
- B34km/h
- C20km/h
- D24km/h
Solution & Step-by-step Explanation
The formula for average speed is:
Average Speed=
Total Time Taken
Total Distance Covered
Total Distance = 40km+20km=60km
Total Time Taken includes the driving time and the rest time:
Total Time=70mins+40mins+40mins=150mins
Convert minutes to hours:
Total Time in hours=
60
150
=2.5hours
Now calculate average speed:
Average Speed=
2.5
60
=24km/h
Average Speed=
Total Time Taken
Total Distance Covered
Total Distance = 40km+20km=60km
Total Time Taken includes the driving time and the rest time:
Total Time=70mins+40mins+40mins=150mins
Convert minutes to hours:
Total Time in hours=
60
150
=2.5hours
Now calculate average speed:
Average Speed=
2.5
60
=24km/h