a man sitting in a train which is traveling at 60 kmph observes that a goods train , traveling in opposite direction , takes 12 seconds to pass him . if the goods train is 300 m long , find its speed
"explanation : relative speed = 300 / 12 m / sec = ( ( 300 / 12 ) × ( 18 / 5 ) ) kmph = 90 kmph . speed of goods train = ( 90 - 60 ) kmph = 30 kmph answer : option d"
subtract(multiply(divide(300, 12), const_3_6), 60)