Question

A train 110m long is moving with a uniform velocity of 45 Km per hr the time it will take to cross a bridge 1 Km long is
A. 77.77s
B.80.00s
C.77.00s
D.88.88s

Answer 1

Total distance train should travel in order to COMPLETELY cross the bridge is

= 1 km + 110 m

= 1000 m + 110 m

= 1110 m

Speed = 45 km/hr

= 45000 m / hr

= 45000 m / (60 × 60 s)

= 12.5 m/s

Time = Distance / Speed

= 1110 m / (12.5 m/s)

= 88.80 s