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 4 hours respectively. The ratio of their speeds is:	Choose the most appropriate option.
A) 2 : 4	B) 4 : 3	C) 6 : 7	D) 9 : 16	E) None of these
Let us name the trains as A and B. Then,   (A's speed) : (B's speed) = âˆšb : âˆša = âˆš4 : âˆš16 = 2 : 4.   2 : 4nswer 2 : 4
<result>A</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 4 hours respectively. The ratio of their speeds is: