Posted by YASH on Sunday, May 22, 2011 at 6:32am.
A TRAIN IS MOVING ON A STRAIGHT TRCK AND TRAVELS AT A SPEED OF 72KM/HR AND PASSES A POLE BIN 3 SECONDS. FIND THE TJME TAKEN TO PASS A BRIDGE OF LENGTH 540m

SCIENCE(PHYSICS)  drwls, Sunday, May 22, 2011 at 9:12am
It must be a rather short train if it passes a pole in three seconds.
72 km/h = 20 m/s. The length of the train must be
L = 20 m/s * 3 s = 60 meters
To cross a bridge 540 m long, you have to add the times it takes the engine to cross (540/20 = 27 seconds) and the three seconds needed for the rest of the train to reach the end. That is a total of 30 seconds.
Answer This Question
Related Questions
 SCIENCE(PHYSICS)  A TRAIN IS MOVING ON A STRAIGHT TRCK AND TRAVELS AT A SPEED ...
 SCIENCE(PHYSICS)  a train is moving on a straight track n travels at a speed ...
 SCIENCE(PHYSICS)  a train is moving on a straight track n travels at a speed ...
 Physics  An electric train leaves a station starting from rest and attains a ...
 physics  James Bond is trying to jump from a bridge and land on the first car ...
 Physics  James Bond is trying to jump from a bridge and land on the first car ...
 physics  1.A train passes an electric post in 8sec and a bridge of length 1km ...
 math  A man standing on a railway bridge which is 180 m long. He find that a ...
 physics  Cora is a passenger in a car traveling east along a country highway ...
 math  a 200 metres long train passes a pole in 15 seconds what is the speed of ...
More Related Questions