Question

A body travels 15 km in 1 hr and 45 km in the next 2 hr. The average speed in km/hr is
These are the options
1)15
2)20
3)25
4)45​

Answer 1

The answer is 29kmph

Answer 2

Answer:

PSP

Explanation:

Speed of car in first 15 minutes = 40 km/h

Distance covered = speed × Time taken

60 minutes = 1 hour

15 minutes =  

60

15

​  

 hour

Distance covered = 240×  

60

15

​  

=10km

Speed of car in next 15 minutes = 60 km/h

Distance covered = 60×  

60

15

​  

=15km

∴ Total distance covered = (10+15)km = 25 km

∴ 25 km is correct