Question

a train moving with velocity 90km/hr crosses a bridge of 1km in 1 min what is the length of the bridge​

Answer 1

speed of train in m/s=25m/s

length of bridge=1km or 1000m

distance covered = length of train +bridge

distance =s*t

=25*60sec

=1500m

now, train = 1500-bridge's length

train's length =1500-1000m

=500m

hope it helps!!!