Length of train is 130 meters and speed of train is 45 km/hour. This train can pass a bridge in 30 seconds, then find the length of the bridge
Choose the correct choice from the following.
A) 230 meters  B) 235 meters  C) 240 meters  D) 245 meters  E) None of these
Explanation:   Let the length of bridge is X [as always we do :)]   Speed of train is = 45*(5/18) m/sec = 25/2 m/sec   Time = 30 seconds   Total distance = 130+x   We know Speed = distance/time   so,   130+x/30=25/2   =&gt;2(130+x)=750   x=245 meters   So length of the bridge is 245 meters   Option 245 meters
<result>D</result>
Length of train is 130 meters and speed of train is 45 km/hour. This train can pass a bridge in 30 seconds, then find the length of the bridge