How long does a train 120 m long running at the speed of 70 km/hr takes to cross a bridge 150 m length? Choices.
A) 12.7 sec	B) 13.9 sec	C) 18.1 sec	D) 17.1 sec	E) 19.7 sec
Speed = 70 * 5/18   = 19.4 m/sec   Total distance covered   = 120 + 150= 
<gadget id="calculator">120 + 150</gadget>
<output>270</output>
270 m.   Required time= 270/19.4 '   = 13.9 sec.   Answer:13.9 sec
<result>B</result>
How long does a train 120 m long running at the speed of 70 km/hr takes to cross a bridge 150 m length?