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 16 hours and 9 hours respectively. The ratio of their speeds is?
Answers.
A) 4:5	B) 4:3	C) 4:4	D) 4:9	E) 3:4
Let us name the trains A and B.   Then, (A's speed) : (B's speed)   = √b : √a = √9 : √16 = 3:4   Answer:3:4
<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 16 hours and 9 hours respectively. The ratio of their speeds is?