Two trains, one from P to Q and the other from Q to P, start simultaneously. After they meet, the trains reach their destinations after 9 hours and 16 hours respectively. The ratio of their speeds is Choose the correct option:
A) 4:1
B) 4:2
C) 4:5
D) 4:3
E) 4:6
Ratio of their speeds = Speed of first train : Speed of second train   = 16−−√9√   = 4:3   Answer is 4:3.
<result>D</result>
Two trains, one from P to Q and the other from Q to P, start simultaneously. After they meet, the trains reach their destinations after 9 hours and 16 hours respectively. The ratio of their speeds is