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 36 hours respectively. The ratio of their speeds is?	Choose the correct choice from the following options:
A) 3:6
B) 6:3
C) 4:9
D) 4:4
E) 4:2
Let us name the trains A and B.   Then, (A's speed) : (6:3's speed)   = âˆšb : âˆša = âˆš36 : âˆš9 = 6:3.Answer: 6:3
<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 36 hours respectively. The ratio of their speeds is?