Question

12. X and Y are two towns. A man goes from town
X to town Y at an average speed of 30 km per
1 hour and returns at the average speed of 20
km per hour. Find the distance between the
two towns if the man takes 10 hours on the
whole.​

Answer 1

speed=  

time

distance

​  

 

Let the distance from X to Y be d km

Let the time taken from X to Y at a speed of 30 km/hr be t  

1

​  

 

Therefore,  

⇒30=  

t  

1

​d

​   ⇒d=30 t  

1

​