A train is 435 meter long is running at a speed of 45 km/hour. In what time will it pass a bridge of 140 meter length  Options: A) 20 seconds B) 30 seconds C) 46 seconds D) 50 seconds E) None of these
Explanation:   Speed = 45 Km/hr = 45*(5/18) m/sec   = 25/2 m/sec   Total distance = 435+140= 
<gadget id="calculator">435+140</gadget>
<output>575</output>
575 meter   Time= Distance/speed   =575∗2/25=46seconds   Option 46 seconds
<result>C</result>
A train is 435 meter long is running at a speed of 45 km/hour. In what time will it pass a bridge of 140 meter length