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 9 hours and 25 hours respectively. The ratio of their speeds is? Choices.
A) 4:5  B) 5:3  C) 4:4  D) 4:8  E) 4:1
Let us name the trains A and B.   Then, (A's speed) : (5:3's speed)   = √b : √a = √25 : √9   = 5:3   Answer: 5:3
<result>B</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 9 hours and 25 hours respectively. The ratio of their speeds is?