Two trains running in opposite directions cross a man standing on the platform in 35 seconds and 28 seconds respectively and they cross each other in 32 seconds. The ratio of their speeds is: Choose the correct choice: A) 3 : 1 B) 4: 3 C) 3 : 8 D) 3 : 25 E) 3 : 4
Let the speeds of the two trains be x m/sec and y m/sec respectively. Then, length of the first train = 35 x meters, and length of the second train = 28 y meters. (35 x + 28 y) / (x + y) = 32   ==&gt; 35 x + 28 y = 32 x + 32 y ==&gt; 3 x = 4 y ==&gt; x/y = 4/3   Answer: Option 4: 3
<result>B</result>
Two trains running in opposite directions cross a man standing on the platform in 35 seconds and 28 seconds respectively and they cross each other in 32 seconds. The ratio of their speeds is: