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 25 hours and 16 hours respectively. The ratio of their speeds is
Select.
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−−√25   = 4:5   Answer is 4:5
<result>C</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 25 hours and 16 hours respectively. The ratio of their speeds is