Two cars A and B start at the same time ad move in opposite directions between the places x and y. The time taken by Car A and Car B to reach their destinations after they meet each other on their way is 4 hours and 9 hours respectively. Then the ratio of the speeds of cars A and B is

A

3 : 2

B

2 : 3

C

9 : 4

D

4 : 9