How long does a train 105 m long running at the speed of 68 km/hr takes to cross a bridge 90 m length?  Choose the correct choice from the following options.
A) 13.9 sec	B) 10.7 sec	C) 17.9 sec	D) 61.9 sec	E) 47.98 sec
Speed = 68 * 5/18 = 19m/sec   Total distance covered = 105 + 90 = 205 m.   Required time = 205/19 = 10.7 sec.   Answer:10.7 sec
<result>B</result>
How long does a train 105 m long running at the speed of 68 km/hr takes to cross a bridge 90 m length?