The length of the bridge, which a train 130 metres long and travelling at 54 km/hr can cross in 30 seconds, is:
Options:
A) 200 m  B) 225 m  C) 320 m  D) 250 m  E) 240 m
Speed = [54 X 5/18] m/sec = [15/1] m/sec   Time = 30 sec   Let the length of bridge be x metres.   Then, (130 + x)/30 = 15 =&gt; (130 + x) = 450 =&gt; x = 450-130= 
<gadget id="calculator">450-130</gadget>
<output>320</output>
320m   ANSWER:320 m
<result>C</result>
The length of the bridge, which a train 130 metres long and travelling at 54 km/hr can cross in 30 seconds, is: