A bus covers a 60 kilometre distance in 1 hour 30 minutes, whereas the same distance is covered by a car in 45 minutes. What is the ratio of the speed of the car to the speed of the bus?

2 : 1

As, distance is same . So , Speed is inversely proportional to time .

1 hour 30 minute = 90 minutes

Ratio of            Bus      :       Car

Time                 90       :         45

                        2         :          1

Speed               1         :          2

So , Speed of Car to the Speed of Speed is  2 : 1 .