Question

A car travels 30 kilometers at a uniform speed of 40 km/hr and next 30 km at a uniform speed of 20 km/hr . Find its average speed.

Answer 1

Answer:

Step-by-step explanation:

The total time for the journey is given as,

t=  

v  

1

​  

 

d  

1

​  

 

​  

+  

v  

2

​  

 

d  

2

​  

 

​  

 

=  

40

30

​  

+  

20

30

​  

 

=2.25hour

The average speed is given as,

v  

avg

​  

=  

t

d  

1

​  

+d  

2

​  

 

​  

 

=  

2.25

30+30

​  

 

=26.67km/h

Thus, the average speed of the car is 26.67km/h