A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?
Choose the most appropriate option.
A) 40 sec
B) 42 sec
C) 45 sec
D) 48 sec
E) 60 sec
Formula for converting from km/hr to m/s: X km/hr =[ X *( 5/18) ]m/s.   Therefore, Speed =[ 45 x( 5/18) m/sec=( 25/2 )m/sec.   Total distance to be covered = (360 + 140)= 
<gadget id="calculator">(360 + 140)</gadget>
<output>500</output>
500 m.   Formula for finding Time=( Distance/Speed )   Required time = [ (500 x 2)/25 ] sec = 40 sec.   40 secnswer:40 sec
<result>A</result>
A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?