# A and B are two cars travelling to a destination which is 360 kilometres away. A takes 4 hours to reach the destination. How much time will it take B to reach the destination if the speeds of A and B are in the ratio 9: 12 ?

A and B are two cars travelling to a destination which is 360 kilometres away. A takes 4 hours to reach the destination. How much time will it take B to reach the destination if the speeds of A and B are in the ratio 9: 12 ?

A. 2.5 hrs

B. 3.5 hrs

C. 4.5 hrs

D. 3 hrs

**Answer : **D. 3 hrs

## Explanation :

9x/12x = 9/12

Time = Distance / Speed

4 = 360/9x

so x = 10

12x = 120

Time taken by car b = 360/120 =3 hour