A train is 310 meter long is running at a speed of 45 km/hour. In what time will it pass a bridge of 140 meter length?  Choose the correct choice from the following answers:
A) 36 seconds B) 18 seconds C) 40 seconds D) 19 seconds E) 45 seconds
Speed = 45 Km/hr = 45*(5/18) m/sec = 25/2 m/sec   Total distance = 310+140 = 500 meter   Time = Distance/speed   = 450 * (2/25)= 
<gadget id="calculator">450 * (2/25)</gadget>
<output>36</output>
36 seconds   36 secondsnswer: 36 seconds
<result>A</result>
A train is 310 meter long is running at a speed of 45 km/hour. In what time will it pass a bridge of 140 meter length?