A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long? Choose the correct choice from the following options.
A) 40 sec	B) 42 sec	C) 45 sec	D) 48 sec	E) 49 sec
total length= 360+140= 
<gadget id="calculator">360+140</gadget>
<output>500</output>
500   speed=45km/h=(45*5)/18= 25/2m/s   time=(500*2)/25= 
<gadget id="calculator">(500*2)/25</gadget>
<output>40</output>
40 sec.   40 secNSWER:40 sec
<result>A</result>
A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?