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 49 hours and 16 hours respectively. The ratio of their speeds is  Choose the correct choice from the following.
A) 4:1 B) 4:2 C) 4:5 D) 4:3 E) 4:7
Ratio of their speeds = Speed of first train : Speed of second train   = √16−−√49   = 4:7   Answer is 4:7.
<result>E</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 49 hours and 16 hours respectively. The ratio of their speeds is