Question

a train 300m long is moving at a speed of54 km/hr and it took 40seconds to cross a bridge.the length of the bridge is​

Answer 1

Answer:

300 meters

Step-by-step explanation:

54km/hr is equal to 15m/s (54/3.6 to get m/s)

The train took 40 seconds to cross the bridge while moving 15m/s.

Therefore it traveled 40*15 = 600 meters.

But we have to consider the length of the train is 300 meters, so the total length of the bridge will be 600-300 meters

= 300 meters

Answer 2

Answer:600m

Step-by-step explanation:speed =54×1000/3600=15m/s

Since speed =distance /time

Therefore distance =speed *time

=15*40=600m