The length of the bridge, which a train 170 meters long and travelling at 45 km/hr can cross in 30 ...
The length of the bridge, which a train 170 meters long and travelling at 45 km/hr can cross in 30 seconds, is?
Answer/Solution
205 m
Steps/Work
Speed = (45 * 5/18) m/sec = (25/2) m/sec. Time
= 30 sec. Let the length of bridge be x meters. Then, (170 + X)/30 = 25/2
==> 2(170 + X) = 750 ==> X
= 205 m.
Answer: B
= 30 sec. Let the length of bridge be x meters. Then, (170 + X)/30 = 25/2
==> 2(170 + X) = 750 ==> X
= 205 m.
Answer: B