A train is 400 meter long is running at a speed of 60 km/hour. In what time will it pass a bridge of 800 meter length?	Choose the correct option
A) 72 seconds  B) 27 seconds  C) 40 seconds  D) 128 seconds  E) 18 seconds
Speed = 60 Km/hr = 60*(5/18) m/sec = 150/9 m/sec   Total distance = 400+ 800= 
<gadget id="calculator">400+ 800</gadget>
<output>1_200</output>
1200 meter   Time= Distance/speed   = 1200 * (9/150)= 
<gadget id="calculator">1200 * (9/150)</gadget>
<output>72</output>
72 seconds   72 secondsnswer: 72 seconds
<result>A</result>
A train is 400 meter long is running at a speed of 60 km/hour. In what time will it pass a bridge of 800 meter length?