How long does a train 125 m long running at the speed of 78 km/hr takes to cross a bridge 125 m length?
Select: A) 12.7 sec B) 10.1 sec C) 11.5 sec D) 12.1 sec E) 11.7 sec
Speed = 78 * 5/18   = 21.7 m/sec   Total distance covered   = 125 + 125= 
<gadget id="calculator">125 + 125</gadget>
<output>250</output>
250 m.   Required time= 250/21.7 '   = 11.5 sec.   Answer:11.5 sec
<result>C</result>
How long does a train 125 m long running at the speed of 78 km/hr takes to cross a bridge 125 m length?