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
Choose the correct choice:  A) 52 kmph  B) 56 kmph  C) 58 kmph  D) 30 kmph  E) 34 kmph
Explanation:   Relative speed = 300/12 m / sec = ((300/12)×(18/5)) kmph = 90 kmph.   Speed of goods train = (90 - 60)= 
<gadget id="calculator">(90 - 60)</gadget>
<output>30</output>
30 kmph   Answer: Option 30 kmph
<result>D</result>
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