How long does a train 100 m long running at the speed of 80 km/hr takes to cross a bridge 142 m length?
Choose one:
A) 10.7 sec
B) 10.9 sec
C) 10.1 sec
D) 15.1 sec
E) 12.7 sec
Speed = 80 * 5/18   = 22.2 m/sec   Total distance covered   = 100 + 142= 
<gadget id="calculator">100 + 142</gadget>
<output>242</output>
242 m.   Required time= 242/22.2 '   = 10.9 sec.   Answer:10.9 sec
<result>B</result>
How long does a train 100 m long running at the speed of 80 km/hr takes to cross a bridge 142 m length?