two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively and they cross each other in 23 seconds . the ratio of their speeds i
"explanation : let the speeds of the two trains be x m / sec and y m / sec respectively . then , length of the first train = 27 x metres , and length of the second train = 17 y metres . 27 x + 17 y / x + y = 23 27 x + 17 y = 23 x + 23 y 4 x = 6 y x / y = 3 / 2 answer is b"
divide(subtract(27, 23), subtract(23, 17))