A train is 485 meter long is running at a speed of 45 km/hour. In what time will it pass a bridge of 140 meter length  Pick one:  A) 20 seconds  B) 30 seconds  C) 40 seconds  D) 50 seconds  E) None of these
Explanation:   Speed = 45 Km/hr = 45*(5/18) m/sec   = 25/2 m/sec   Total distance = 485+140= 
<gadget id="calculator">485+140</gadget>
<output>625</output>
625 meter   Time= 50 secondsistance/speed   =625∗2/25=50seconds   Option 50 seconds
<result>D</result>
A train is 485 meter long is running at a speed of 45 km/hour. In what time will it pass a bridge of 140 meter length