Two cars, one from Austin to Dallas and the other from Dallas to Austin, start simultaneously. After they meet, the cars reach their destinations after 4 hours and 9 hours respectively The ratio of their speeds is  Choose the correct choice from the following:
A) 2 : 3 B) 4 : 3 C) 3 : 6 D) 4 : 5 E) none

Rationale: solution let us name the cars as a and b . = ( car a ' s speed ) : ( car b ' s speed ) = â ˆ š b : â ˆ š a = â ˆ š 4 : â ˆ š 9 = 2 : 3 answer a
Answer: A