A girl sitting in a train which is travelling at 40 kmph observes that a goods train travelling in a opposite direction, takes 12 seconds to pass him. If the goods train is 1120 m long, find its speed.	Choose the correct choice from the following options: A) 295 B) 296 C) 297 D) 298 E) 299
Relative speed = (1120/12)m/s = (1120/12)*(18/5)= 
<gadget id="calculator">(1120/12)*(18/5)</gadget>
<output>336</output>
336 kmph   speed of goods train= 336-40= 
<gadget id="calculator">336-40</gadget>
<output>296</output>
296 kmph   Answer is 296
<result>B</result>
A girl sitting in a train which is travelling at 40 kmph observes that a goods train travelling in a opposite direction, takes 12 seconds to pass him. If the goods train is 1120 m long, find its speed.