A train 250 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 150 m long?  Choose the correct choice from the following choices:
A) 45 sec
B) 42 sec
C) 32sec
D) 48 sec
E) 25 sec
total length= 250+150= 
<gadget id="calculator">250+150</gadget>
<output>400</output>
400   speed=45km/h=(45*5)/18= 25/2m/s   time=(400*2)/25= 
<gadget id="calculator">(400*2)/25</gadget>
<output>32</output>
32 sec.   ANSWER:32sec
<result>C</result>
A train 250 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 150 m long?