a man sitting in a train which is traveling at 36 kmph observes that a goods train , traveling in opposite direction , takes 10 seconds to pass him . if the goods train is 240 m long , find its speed
"explanation : relative speed = 240 / 10 m / sec = ( ( 240 / 10 ) × ( 18 / 5 ) ) kmph = 86 kmph . speed of goods train = ( 86 - 36 ) kmph = 50 kmph answer : option a"
subtract(multiply(divide(240, 10), const_3_6), 36)