Question : The ratio of speed of the three racers is 5 : 2 : 1. What is the respective ratio of time taken by the three racers to cover the same distance?

Option 1: 2 : 5 : 10

Option 2: 2 : 5 : 8

Option 3: 5 : 2 : 10

Option 4: 2 : 5 : 3

Question : The ratio of the speed of Aman, Kamal, and Manan is 2 : 3 : 4 respectively. What is the ratio of the time taken by Aman, Kamal, and Manan respectively to cover the same distance?

Option 1: 4 : 3 : 2

Option 2: 2 : 3 : 4

Option 3: 6 : 4 : 3

Option 4: 8 : 9 : 16

Question : A train covers a certain distance in 210 minutes at a speed of 60 km/hr. The time taken by the train, to cover the same distance at a speed of 80 km/hr is:

Option 1: $3\frac{5}{8}\ \text{hours}$

Option 2: $2\frac{5}{8}\ \text{hours}$

Option 3: $4\frac{5}{8}\ \text{hours}$

Option 4: $3\ \text{hours}$

Question : The speed of a motorboat in still water and the speed of the current of water is in the ratio 20 : 4. To go a certain distance along the current the boat takes 4 hours. Find the time taken by the boat to cover the same distance against the current.

Option 1: 6 hours

Option 2: 8 hours

Option 3: 12 hours

Option 4: 10 hours

Question : The ratio of time taken by A and B to cover a certain distance is 17 : 19. Find the ratio of their respective speed.

Option 1: 11 : 15

Option 2: 15 : 19

Option 3: 17 : 15

Option 4: 19 : 17