Two trains, one from Howrah to Patna and the other from Patna to Howrah, start simultaneously. After they meet, the trains reach their destinations after 4 hours and 16 hours respectively. The ratio of their speeds is?  Answers:
A) 4:6
B) 4:3
C) 4:9
D) 4:4
E) 4:2
Let us name the trains A and B.   Then, (A's speed) : (B's speed)   = âˆšb : âˆša = âˆš16 : âˆš4 = 4:2.Answer: 4:2
<result>E</result>
Two trains, one from Howrah to Patna and the other from Patna to Howrah, start simultaneously. After they meet, the trains reach their destinations after 4 hours and 16 hours respectively. The ratio of their speeds is?