The ratio of speed of three racers is 3 : 2 : 4. What is the respective ratio of time taken by the three racers to cover the same distance?

6 : 8 : 9 4 : 8 : 5 10 : 8 : 3 4 : 6 : 3

4 : 6 : 3

When the distance is same, Ratio of speed ∝ $\frac{1}{ratio\; of\; time}$ Ratio of speed =  3  :  2  :  4 Ratio of time       = 4  :  6  :  3