The length of the bridge, which a train 180 meters long and travelling at 48 km/hr can cross in 70 seconds, is:  Choose the correct choice from the following choices:
A) 245
B) 276
C) 987
D) 168
E) 1981
Speed = (45 * 5/18) m/sec = (25/2) m/sec. Time = 30 sec. Let the length of bridge be x meters. Then, (130 + X)/30 = 25/2 ==&gt; 2(130 + X) = 750 ==&gt; X = 245 m.   245nswer: 245
<result>A</result>
The length of the bridge, which a train 180 meters long and travelling at 48 km/hr can cross in 70 seconds, is: