Acar travels
1/6
of the distance between two cities in 3/5
of an hour. at this rate, what fraction of the distance between the two cities can the car travel in 1 hour?

3/5 hour,           1/6 distance was covered.

1 hour              =  (1/6  ÷  3/5)
                       
                        =  1/6 * 5/3  = 5/18.

5/18 of the distance would be covered.