31. 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: A. 2 : 3 B. 4 : 3 C. 6 : 7 D. 9 : 16 Answer & Explanation Answer: Option B Explanation: Let us name the trains as A and B. Then, (A’s speed) : (B’s speed) = b : a = 16 : 9 = 4 : 3.