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 16 hours respectively. The ratio of their speeds is:  Choose the correct choice from the following answers:
A) 2:3
B) 4:3
C) 6:7
D) 9:16
E) 9:7
Let us name the trains as A and B. Then,   (A's speed) : (B's speed) = √b : √a = √16 : √9 = 4 : 3.   Answer :4:3
<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 16 hours respectively. The ratio of their speeds is: