A train is 360 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:  A) 10 sec  B) 20 sec  C) 15 sec  D) 40 sec  E) 45 sec
speed = 45*6/18 = 25/2   tot dist = 360+140= 
<gadget id="calculator">360+140</gadget>
<output>500</output>
500   time= d/s   =500*2/25= 
<gadget id="calculator">500*2/25</gadget>
<output>40</output>
40 sec   ANSWER 40 sec
<result>D</result>
A train is 360 meter long is running at a speed of 45 km/hour. In what time will it pass a bridge of 140 meter length?