Question

A car moves from X to Y with a uniform speed y, and returns to Y with a uniform speed vg. The average speed for this round trip is : [ ] 2v, v 2) Vive VV 3) Vtv + V, + 2 4) Ta diaren​

Answer 1

Answer:

Correct option is

A

v  

d

​

+v  

u

​

 

2v  

d

​

v  

u

​

 

​

 

Average speed is always given by  

Total time

Total distance

​

 

Let's assume that distance between X and Y is d

So, time taken to go from X to Y will be  

v  

u

​

 

d

​

 

And time taken to go from Y to X will be  

v  

d

​

 

d

​

 

So, average speed will be  

v  

u

​

 

d

​

+  

v  

d

​

 

d

​

 

2d

​

=  

v  

d

​

+v  

u

​

 

2v  

d

​

v  

u

​

 

​

Explanation:

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