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 121 hours and 100 hours respectively. The ratio of their speeds is:
Choices.
A) 2 : 3	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 = âˆš100 : âˆš121 = 10 : 11.   Answer None of these
<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 121 hours and 100 hours respectively. The ratio of their speeds is: