How long does a train 120 m long running at the speed of 70 km/hr takes to cross a bridge 145 m length?
Answers
A) 13.9 sec  B) 12.1 sec  C) 17.9 sec  D) 13.9 sec  E) 47.98 sec
Speed = 70 * 5/18 = 19 m/sec   Total distance covered = 120 + 145= 
<gadget id="calculator">120 + 145</gadget>
<output>265</output>
265 m.   Required time= 265/19 = 13.9 sec.   Answer:13.9 sec
<result>D</result>
How long does a train 120 m long running at the speed of 70 km/hr takes to cross a bridge 145 m length?