Ratio of speeds of A and B is a:b: then ratio of the time taken by them to cover the same distance

Speed of Karan is 40 km/h and speed of Arjun is 60km/h. What is the ratio of time taken by each to cover the same distance?

The speeds of three cars are in the ratio of 2 : 3 : 5 Find the ratio of the time taken by the above cars to travel the same distance.

The speeds of three cars are in the ratio 4: 3: 2. What is the ratio between the times taken by the cars to cover the same distance ?

Two bodies of different masses m_(a) and m_(b) are dropped from two different heights a and b. The ratio of the time taken by the two to cover these distances are

The speeds of three cars are in the ratio of 2:3:4 Find the ratio between the time taken by these cars to cover the same distance.